UVA难度排名

Jasonlin posted @ 2011年3月24日 11:44 in UVA , 19379 阅读

 

#

ID

Title

Solved by

Difficulty

1

100

The 3n + 1 problem

26485

1

2

102

Ecological Bin Packing

10608

2

3

10071

Back to High School Physics

9554

3

4

10055

Hashmat the Brave Warrior

9432

3

5

272

TEX Quotes

8192

3

6

458

The Decoder

7289

4

7

136

Ugly Numbers

6729

4

8

10038

Jolly Jumpers

6319

4

9

10035

Primary Arithmetic

6268

4

10

10018

Reverse and Add

6061

4

11

108

Maximum Sum

6022

4

12

113

Power of Cryptography

5804

5

13

494

Kindergarten Counting Game

5784

5

14

299

Train Swapping

5752

5

15

10082

WERTYU

5481

5

16

101

The Blocks Problem

5225

5

17

591

Box of Bricks

5113

5

18

10008

What's Cryptanalysis?

4942

5

19

10300

Ecological Premium

4839

5

20

575

Skew Binary

4732

6

21

369

Combinations

4543

6

22

151

Power Crisis

4470

6

23

382

Perfection

4393

6

24

10370

Above Average

4377

6

25

160

Factors and Factorials

4314

6

26

10189

Minesweeper

4303

6

27

579

ClockHands

4293

6

28

264

Count on Cantor

4237

6

29

424

Integer Inquiry

4214

6

30

499

What's The Frequency, Kenneth?

4194

6

31

10110

Light, More Light

4189

6

32

541

Error Correction

4096

6

33

543

Goldbach's Conjecture

4021

7

34

10004

Bicoloring

3939

7

35

10107

What is the Median?

3891

7

36

374

Big Mod

3876

7

37

686

Goldbach's Conjecture (II)

3852

7

38

105

The Skyline Problem

3839

7

39

495

Fibonacci Freeze

3827

7

40

483

Word Scramble

3793

7

41

10041

Vito's Family

3785

7

42

10019

Funny Encryption Method

3773

7

43

256

Quirksome Squares

3713

7

44

138

Street Numbers

3661

7

45

10079

Pizza Cutting

3627

7

46

530

Binomial Showdown

3609

7

47

10696

f91

3552

7

48

111

History Grading

3533

7

49

10340

All in All

3501

8

50

10783

Odd Sum

3500

8

51

476

Points in Figures: Rectangles

3481

8

52

344

Roman Digititis

3443

8

53

673

Parentheses Balance

3436

8

54

10346

Peter's Smoke

3367

8

55

120

Stacks of Flapjacks

3359

8

56

10469

To Carry or not to Carry

3338

8

57

10127

Ones

3329

8

58

492

Pig-Latin

3265

8

59

438

The Circumference of the Circle

3252

8

60

10327

Flip Sort

3214

8

61

401

Palindromes

3212

8

62

10050

Hartals

3211

8

63

103

Stacking Boxes

3207

8

64

324

Factorial Frequencies

3191

8

65

146

ID Codes

3138

8

66

350

Pseudo-Random Numbers

3115

9

67

10106

Product

3083

9

68

10222

Decode the Mad man

3037

9

69

10006

Carmichael Numbers

3036

9

70

568

Just the Facts

3033

9

71

440

Eeny Meeny Moo

3023

9

72

305

Joseph

2986

9

73

10405

Longest Common Subsequence

2954

9

74

583

Prime Factors

2952

9

75

484

The Department of Redundancy Department

2947

9

76

10302

Summation of Polynomials

2934

9

77

477

Points in Figures: Rectangles and Circles

2933

9

78

412

Pi

2898

9

79

446

Kibbles ``n'' Bits ``n'' Bits ``n'' Bits

2890

9

80

406

Prime Cuts

2885

9

81

10260

Soundex

2848

9

82

640

Self Numbers

2846

9

83

572

Oil Deposits

2835

9

84

294

Divisors

2832

9

85

118

Mutant Flatworld Explorers

2816

9

86

107

The Cat in the Hat

2791

9

87

445

Marvelous Mazes

2775

10

88

112

Tree Summing

2755

10

89

694

The Collatz Sequence

2741

10

90

706

LCD Display

2736

10

91

10013

Super long sums

2702

10

92

439

Knight Moves

2699

10

93

443

Humble Numbers

2680

10

94

674

Coin Change

2644

10

95

10812

Beat the Spread!

2596

10

96

371

Ackermann Functions

2573

10

97

834

Continued Fractions

2565

10

98

119

Greedy Gift Givers

2552

10

99

10220

I Love Big Numbers !

2532

10

100

386

Perfect Cubes

2529

10

101

167

The Sultan's Successors

2484

11

102

444

Encoder and Decoder

2477

11

103

713

Adding Reversed Numbers

2471

11

104

195

Anagram

2464

11

105

392

Polynomial Showdown

2458

11

106

10424

Love Calculator

2453

11

107

190

Circle Through Three Points

2430

11

108

291

The House Of Santa Claus

2425

11

109

10161

Ant on a Chessboard

2410

11

110

489

Hangman Judge

2373

11

111

128

Software CRC

2359

11

112

133

The Dole Queue

2334

11

113

490

Rotating Sentences

2323

11

114

10003

Cutting Sticks

2312

11

115

573

The Snail

2277

12

116

10098

Generating Fast, Sorted Permutation

2266

12

117

488

Triangle Wave

2252

12

118

408

Uniform Generator

2243

12

119

10324

Zeros and Ones

2225

12

120

10235

Simply Emirp

2220

12

121

441

Lotto

2200

12

122

106

Fermat vs. Pythagoras

2196

12

123

414

Machined Surfaces

2181

12

124

623

500!

2174

12

125

10323

Factorial! You Must be Kidding!!!

2141

12

126

576

Haiku Review

2138

12

127

200

Rare Order

2119

12

128

10209

Is This Integration ?

2118

13

129

10252

Common Permutation

2114

13

130

10432

Polygon Inside A Circle

2108

13

131

10062

Tell me the frequencies!

2101

13

132

116

Unidirectional TSP

2076

13

133

536

Tree Recovery

2046

13

134

10473

Simple Base Conversion

2034

13

135

10131

Is Bigger Smarter?

2017

13

136

847

A Multiplication Game

2012

13

137

10699

Count the factors

2010

13

138

104

Arbitrage

2005

13

139

10924

Prime Words

2004

13

140

417

Word Index

1992

13

141

156

Ananagrams

1986

13

142

496

Simply Subsets

1982

13

143

10409

Die Game

1982

13

144

478

Points in Figures: Rectangles, Circles, Triangles

1973

13

145

10530

Guessing Game

1966

13

146

10929

You can say 11

1963

13

147

621

Secret Research

1960

14

148

10195

The Knights Of The Round Table

1960

14

149

10338

Mischievous Children

1954

14

150

10066

The Twin Towers

1935

14

151

130

Roman Roulette

1933

14

152

352

The Seasonal War

1929

14

153

10921

Find the Telephone

1921

14

154

400

Unix ls

1914

14

155

10579

Fibonacci Numbers

1849

14

156

10192

Vacation

1843

14

157

10515

Powers Et Al.

1829

14

158

117

The Postal Worker Rings Once

1827

14

159

10000

Longest Paths

1822

15

160

147

Dollars

1805

15

161

846

Steps

1804

15

162

10550

Combination Lock

1803

15

163

155

All Squares

1797

15

164

191

Intersection

1796

15

165

10104

Euclid Problem

1796

15

166

10499

The Land of Justice

1762

15

167

10591

Happy Number

1744

15

168

10137

The Trip

1733

15

169

122

Trees on the level

1729

15

170

121

Pipe Fitters

1714

15

171

10310

Dog and Gopher

1714

15

172

10193

All You Need Is Love

1691

16

173

10305

Ordering Tasks

1689

16

174

10034

Freckles

1679

16

175

357

Let Me Count The Ways

1653

16

176

389

Basically Speaking

1652

16

177

10334

Ray Through Glasses

1637

16

178

10931

Parity

1634

16

179

10010

Where's Waldorf?

1615

16

180

271

Simply Syntax

1604

17

181

10099

The Tourist Guide

1604

17

182

300

Maya Calendar

1601

17

183

10450

World Cup Noise

1591

17

184

532

Dungeon Master

1590

17

185

562

Dividing coins

1585

17

186

514

Rails

1571

17

187

498

Polly the Polynomial

1569

17

188

612

DNA Sorting

1561

17

189

10105

Polynomial Coefficients

1560

17

190

534

Frogger

1555

17

191

10282

Babelfish

1555

17

192

594

One Little, Two Little, Three Little Endians

1549

17

193

348

Optimal Array Multiplication Sequence

1546

17

194

442

Matrix Chain Multiplication

1539

17

195

336

A Node Too Far

1532

17

196

10015

Joseph's Cousin

1521

17

197

10789

Prime Frequency

1507

18

198

10033

Interpreter

1505

18

199

10168

Summation of Four Primes

1499

18

200

340

Master-Mind Hints

1496

18

201

144

Student Grants

1482

18

202

10042

Smith Numbers

1477

18

203

154

Recycling

1460

18

204

10533

Digit Primes

1456

18

205

10420

List of Conquests

1455

18

206

109

SCUD Busters

1446

18

207

740

Baudot Data Communication Code

1431

19

208

10361

Automatic Poetry

1418

19

209

10394

Twin Primes

1417

19

210

216

Getting in Line

1413

19

211

544

Heavy Cargo

1406

19

212

10183

How Many Fibs?

1396

19

213

378

Intersecting Lines

1395

19

214

10286

Trouble with a Pentagon

1393

19

215

624

CD

1383

19

216

10074

Take the Land

1382

19

217

11000

Bee

1381

19

218

661

Blowing Fuses

1374

19

219

10922

2 the 9s

1374

19

220

10116

Robot Motion

1371

19

221

10608

Friends

1369

19

222

278

Chess

1367

19

223

10295

Hay Points

1365

19

224

10336

Rank the Languages

1359

19

225

537

Artificial Intelligence?

1353

20

226

10221

Satellites

1351

20

227

642

Word Amalgamation

1349

20

228

10191

Longest Nap

1339

20

229

11172

Relational Operator

1334

20

230

10276

Hanoi Tower Troubles Again!

1323

20

231

587

There's treasure everywhere!

1321

20

232

10970

Big Chocolate

1320

20

233

524

Prime Ring Problem

1316

20

234

10219

Find the ways !

1316

20

235

343

What Base Is This?

1311

20

236

516

Prime Land

1311

20

237

10152

ShellSort

1300

20

238

315

Network

1294

20

239

574

Sum It Up

1292

20

240

567

Risk

1289

21

241

474

Heads / Tails Probability

1287

21

242

355

The Bases Are Loaded

1285

21

243

10049

Self-describing Sequence

1273

21

244

10070

Leap Year or Not Leap Year and ...

1272

21

245

10182

Bee Maja

1267

21

246

10223

How many nodes ?

1262

21

247

636

Squares (III)

1250

21

248

202

Repeating Decimals

1247

21

249

10130

SuperSale

1245

21

250

10196

Check The Check

1243

21

251

10190

Divide, But Not Quite Conquer!

1241

21

252

10198

Counting

1241

21

253

123

Searching Quickly

1239

21

254

729

The Hamming Distance Problem

1207

22

255

10297

Beavergnaw

1206

22

256

10700

Camel trading

1195

22

257

320

Border

1189

22

258

465

Overflow

1187

22

259

497

Strategic Defense Initiative

1187

22

260

153

Permalex

1186

22

261

739

Soundex Indexing

1181

22

262

637

Booklet Printing

1177

23

263

10067

Playing with Wheels

1177

23

264

124

Following Orders

1169

23

265

409

Excuses, Excuses!

1169

23

266

423

MPI Maelstrom

1163

23

267

422

Word-Search Wonder

1156

23

268

459

Graph Connectivity

1153

23

269

486

English-Number Translator

1149

23

270

10026

Shoemaker's Problem

1146

23

271

10611

The Playboy Chimp

1140

23

272

253

Cube painting

1139

23

273

10474

Where is the Marble?

1135

23

274

10701

Pre, in and post

1132

23

275

10048

Audiophobia

1128

23

276

482

Permutation Arrays

1127

24

277

555

Bridge Hands

1121

24

278

10509

R U Kidding Mr. Feynman!

1120

24

279

10077

The Stern-Brocot Number System

1118

24

280

311

Packets

1113

24

281

10784

Diagonal

1113

24

282

10258

Contest Scoreboard

1111

24

283

485

Pascal's Triangle of Death

1109

24

284

748

Exponentiation

1105

24

285

413

Up and Down Sequences

1103

24

286

531

Compromise

1102

24

287

558

Wormholes

1102

24

288

10573

Geometry Paradox

1102

24

289

10945

Mother bear

1102

24

290

145

Gondwanaland Telecom

1094

24

291

10407

Simple division

1094

24

292

10170

The Hotel with Infinite Rooms

1086

24

293

114

Simulation Wizardry

1080

25

294

10025

The ? 1 ? 2 ? ... ? n = k problem

1078

25

295

10242

Fourth Point !!

1078

25

296

201

Squares

1077

25

297

10465

Homer Simpson

1076

25

298

297

Quadtrees

1073

25

299

326

Extrapolation Using a Difference Table

1073

25

300

10102

The path in the colored field

1071

25

301

170

Clock Patience

1063

25

302

10179

Irreducable Basic Fractions

1062

25

303

10162

Last Digit

1061

25

304

161

Traffic Lights

1058

25

305

140

Bandwidth

1053

25

306

10036

Divisibility

1052

25

307

10487

Closest Sums

1049

25

308

356

Square Pegs And Round Holes

1045

25

309

231

Testing the CATCHER

1037

26

310

10622

Perfect P-th Powers

1034

26

311

10678

The Grazing Cow

1028

26

312

784

Maze Exploration

1027

26

313

10009

All Roads Lead Where?

1023

26

314

10285

Longest Run on a Snowboard

1015

26

315

10056

What is the Probability ?

1010

26

316

10139

Factovisors

1010

26

317

10347

Medians

1009

26

318

10489

Boxes of Chocolates

1009

26

319

639

Don't Get Rooked

1007

26

320

615

Is It A Tree?

1006

26

321

836

Largest Submatrix

1006

26

322

10642

Can You Solve It?

1003

26

323

539

The Settlers of Catan

1001

26

324

701

The Archeologists' Dilemma

1001

26

325

10684

The jackpot

1001

26

326

10451

Ancient Village Sports

994

27

327

115

Climbing Trees

993

27

328

10703

Free spots

993

27

329

10427

Naughty Sleepy Boys

984

27

330

10633

Rare Easy Problem

981

27

331

325

Identifying Legal Pascal Real Constants

977

27

332

166

Making Change

973

27

333

455

Periodic Strings

973

27

334

152

Tree's a Crowd

971

27

335

275

Expanding Fractions

970

27

336

507

Jill Rides Again

968

27

337

10408

Farey sequences

967

27

338

10502

Counting Rectangles

967

27

339

10014

Simple calculations

964

27

340

384

Slurpys

962

28

341

10093

An Easy Problem!

961

28

342

125

Numbering Paths

958

28

343

141

The Spot Game

958

28

344

10125

Sumsets

958

28

345

10229

Modular Fibonacci

957

28

346

437

The Tower of Babylon

953

28

347

333

Recognizing Good ISBNs

952

28

348

10878

Decode the tape

949

28

349

10815

Andy's First Dictionary

944

28

350

10188

Automated Judge Script

940

28

351

10267

Graphical Editor

940

28

352

608

Counterfeit Dollar

934

28

353

110

Meta-Loopless Sorts

928

29

354

193

Graph Coloring

924

29

355

10299

Relatives

919

29

356

628

Passwords

916

29

357

10491

Cows and Cars

916

29

358

10365

Blocks

914

29

359

10080

Gopher II

913

29

360

580

Critical Mass

910

29

361

337

Interpreting Control Sequences

907

29

362

10020

Minimal coverage

902

29

363

164

String Computer

900

29

364

10714

Ants

900

29

365

377

Cowculations

899

29

366

10583

Ubiquitous Religions

899

29

367

700

Date Bugs

898

29

368

10176

Ocean Deep ! - Make it shallow !!

896

30

369

450

Little Black Book

890

30

370

436

Arbitrage (II)

885

30

371

10490

Mr. Azad and his Son!!!!!

884

30

372

10281

Average Speed

882

30

373

280

Vertex

879

30

374

10007

Count the Trees

877

30

375

10140

Prime Distance

873

30

376

725

Division

871

30

377

793

Network Connections

871

30

378

10298

Power Strings

869

30

379

10452

Marcus, help!

866

31

380

10404

Bachet's Game

861

31

381

10100

Longest Match

859

31

382

11185

Ternary

859

31

383

619

Numerically Speaking

854

31

384

10205

Stack 'em Up

853

31

385

644

Immediate Decodability

849

31

386

10508

Word Morphing

849

31

387

542

France '98

848

31

388

10673

Play with Floor and Ceil

848

31

389

127

``Accordian'' Patience

844

31

390

571

Jugs

844

31

391

332

Rational Numbers from Repeating Fractions

841

31

392

10359

Tiling

839

32

393

10078

The Art Gallery

838

32

394

10539

Almost Prime Numbers

832

32

395

696

How Many Knights

831

32

396

10002

Center of Masses

830

32

397

10948

The primary problem

830

32

398

263

Number Chains

824

32

399

353

Pesky Palindromes

821

32

400

712

S-Trees

819

32

401

10656

Maximum Sum (II)

812

33

402

10400

Game Show Math

810

33

403

466

Mirror, Mirror

807

33

404

10115

Automatic Editing

805

33

405

727

Equation

803

33

406

129

Krypton Factor

799

33

407

448

OOPS!

797

33

408

10664

Luggage

796

33

409

232

Crossword Answers

794

33

410

131

The Psychic Poker Player

793

33

411

10129

Play on Words

784

34

412

10194

Football (aka Soccer)

784

34

413

10081

Tight Words

783

34

414

10142

Australian Voting

780

34

415

10363

Tic Tac Toe

780

34

416

10303

How Many Trees?

774

34

417

10397

Connect the Campus

773

34

418

10935

Throwing cards away I

773

34

419

895

Word Problem

772

34

420

10293

Word Length and Frequency

767

35

421

10301

Rings and Glue

764

35

422

679

Dropping Balls

762

35

423

641

Do the Untwist

760

35

424

620

Cellular Structure

755

35

425

10311

Goldbach and Euler

755

35

426

383

Shipping Routes

751

35

427

10790

How Many Points of Intersection?

751

35

428

10954

Add All

746

36

429

126

The Errant Physicist

743

36

430

10800

Not That Kind of Graph

743

36

431

260

Il Gioco dell'X

741

36

432

10415

Eb Alto Saxophone Player

740

36

433

227

Puzzle

739

36

434

10443

Rock, Scissors, Paper

739

36

435

755

487--3279

738

36

436

913

Joana and the Odd Numbers

737

36

437

602

What Day Is It?

734

36

438

10940

Throwing cards away II

734

36

439

681

Convex Hull Finding

730

36

440

301

Transportation

729

36

441

306

Cipher

725

37

442

10112

Myacm Triangles

719

37

443

10341

Solve It

717

37

444

10494

If We Were a Child Again

717

37

445

585

Triangles

716

37

446

750

8 Queens Chess Problem

713

37

447

11044

Searching for Nessy

713

37

448

850

Crypt Kicker II

711

37

449

10315

Poker Hands

705

38

450

10852

Less Prime

705

38

451

10279

Mine Sweeper

704

38

452

394

Mapmaker

702

38

453

10496

Collecting Beepers

700

38

454

10903

Rock-Paper-Scissors Tournament

700

38

455

10283

The Kissing Circles

694

38

456

900

Brick Wall Patterns

691

38

457

460

Overlapping Rectangles

690

38

458

699

The Falling Leaves

687

39

459

402

M*A*S*H

685

39

460

10037

Bridge

684

39

461

10128

Queue

684

39

462

10101

Bangla Numbers

681

39

463

10693

Traffic Volume

679

39

464

825

Walking on the Safe Side

677

39

465

10057

A mid-summer night's dream.

675

39

466

10063

Knuth's Permutation

672

39

467

11059

Maximum Product

672

39

468

10069

Distinct Subsequences

670

40

469

213

Message Decoding

669

40

470

481

What Goes Up

666

40

471

785

Grid Colouring

665

40

472

10344

23 out of 5

664

40

473

10377

Maze Traversal

659

40

474

10551

Basic Remains

658

40

475

11192

Group Reverse

655

40

476

10245

The Closest Pair Problem

654

40

477

10706

Number Sequence

654

40

478

762

We Ship Cheap

651

41

479

10141

Request for Proposal

650

41

480

10600

ACM Contest and Blackout

647

41

481

159

Word Crosses

643

41

482

10810

Ultra-QuickSort

642

41

483

187

Transaction Processing

640

41

484

397

Equation Elation

640

41

485

808

Bee Breeding

640

41

486

861

Little Bishops

640

41

487

188

Perfect Hash

639

41

488

331

Mapping the Swaps

639

41

489

821

Page Hopping

635

42

490

10392

Factoring Large Numbers

633

42

491

469

Wetlands of Florida

632

42

492

839

Not so Mobile

631

42

493

820

Internet Bandwidth

630

42

494

11057

Exact Sum

629

42

495

10054

The Necklace

625

42

496

884

Factorial Factors

618

43

497

10375

Choose and divide

618

43

498

10976

Fractions Again?!

615

43

499

10523

Very Easy !!!

613

43

500

10589

Area

612

43

501

218

Moth Eradication

611

43

502

10519

!! Really Strange !!

608

44

503

10368

Euclid's Game

604

44

504

10918

Tri Tiling

602

44

505

10919

Prerequisites?

601

44

506

134

Loglan-A Logical Language

597

44

507

142

Mouse Clicks

596

44

508

391

Mark-up

594

45

509

10719

Quotient Polynomial

594

45

510

10177

(2/3/4)-D Sqr/Rects/Cubes/Boxes?

593

45

511

10730

Antiarithmetic?

592

45

512

254

Towers of Hanoi

587

45

513

10534

Wavio Sequence

585

45

514

148

Anagram checker

584

45

515

651

Deck

584

45

516

626

Ecosystem

583

45

517

10683

The decadary watch

582

46

518

435

Block Voting

581

46

519

10943

How do you add?

581

46

520

11121

Base -2

581

46

521

630

Anagrams (II)

580

46

522

634

Polygon

579

46

523

10500

Robot maps

579

46

524

737

Gleaming the Cubes

577

46

525

10360

Rat Attack

576

46

526

10287

Gifts in a Hexagonal Box

575

46

527

711

Dividing up

573

46

528

183

Bit Maps

571

46

529

362

18,000 Seconds Remaining

570

46

530

10051

Tower of Cubes

570

46

531

132

Bumpy Objects

569

47

532

10165

Stone Game

568

47

533

10213

How Many Pieces of Land ?

564

47

534

10369

Arctic Network

564

47

535

10916

Factstone Benchmark

564

47

536

10905

Children's Game

562

47

537

416

LED Test

561

47

538

10012

How Big Is It?

561

47

539

10879

Code Refactoring

560

47

540

540

Team Queue

559

47

541

10566

Crossed Ladders

558

47

542

10702

Travelling Salesman

556

48

543

880

Cantor Fractions

554

48

544

429

Word Transformation

553

48

545

10596

Morning Walk

551

48

546

10249

The Grand Dinner

550

48

547

10422

Knights in FEN

550

48

548

535

Globetrotter

548

48

549

10001

Garden of Eden

547

48

550

10326

The Polynomial Equation

547

48

551

703

Triple Ties: The Organizer's Nightmare

546

49

552

184

Laser Lines

544

49

553

10493

Cats, with or without Hats

544

49

554

10393

The One-Handed Typist

542

49

555

11005

Cheapest Base

539

49

556

379

Hi-Q

538

49

557

617

Nonstop Travel

537

49

558

714

Copying Books

536

49

559

10065

Useless Tile Packers

536

49

560

11063

B2-Sequence

536

49

561

10016

Flip-Flop the Squarelotron

534

50

562

10651

Pebble Solitaire

534

50

563

10803

Thunder Mountain

534

50

564

10364

Square

532

50

565

11069

A Graph Problem

532

50

566

601

The PATH

530

50

567

10813

Traditional BINGO

530

50

568

434

Matty's Blocks

529

50

569

10680

LCM

527

50

570

10930

A-Sequence

527

50

571

10653

Bombs! NO they are Mines!!

526

50

572

10210

Romeo and Juliet !

525

50

573

10926

How Many Dependencies?

525

50

574

11040

Add bricks in the wall

525

50

575

10199

Tourist Guide

523

51

576

10908

Largest Square

523

51

577

550

Multiplying by Rotation

521

51

578

590

Always on the run

516

51

579

208

Firetruck

515

51

580

10374

Election

514

52

581

10667

Largest Block

514

52

582

10200

Prime Time

513

52

583

10330

Power Transmission

512

52

584

10518

How Many Calls?

511

52

585

10147

Highways

510

52

586

273

Jack Straws

508

52

587

347

Run, Run, Runaround Numbers

508

52

588

10910

Marks Distribution

508

52

589

10061

How many zero's and how many digits ?

506

52

590

10088

Trees on My Island

506

52

591

855

Lunch in Grid City

505

52

592

10849

Move the bishop

505

52

593

10507

Waking up brain

502

53

594

10946

You want what filled?

502

53

595

165

Stamps

501

53

596

454

Anagrams

501

53

597

10306

e-Coins

501

53

598

327

Evaluating Simple C Expressions

499

53

599

10171

Meeting Prof. Miguel...

498

53

600

10791

Minimum Sum LCM

497

53

601

10044

Erdos Numbers

496

53

602

10763

Foreign Exchange

495

54

603

688

Mobile Phone Coverage

494

54

604

10739

String to Palindrome

493

54

605

10880

Colin and Ryan

490

54

606

10780

Again Prime? No Time.

489

54

607

10371

Time Zones

488

54

608

843

Crypt Kicker

485

55

609

10620

A Flea on a Chessboard

485

55

610

318

Domino Effect

483

55

611

471

Magic Numbers

482

55

612

10602

Editor Nottobad

481

55

613

11074

Draw Grid

481

55

614

11015

05-2 Rendezvous

479

55

615

186

Trip Routing

478

55

616

10391

Compound Words

477

56

617

10484

Divisibility of Factors

477

56

618

381

Making the Grade

476

56

619

677

All Walks of length ``n'' from the first node

476

56

620

10446

The Marriage Interview :-)

476

56

621

10773

Back to Intermediate Math

476

56

622

255

Correct Move

475

56

623

10527

Persistent Numbers

475

56

624

10202

Pairsumonious Numbers

474

56

625

10497

Sweet Child Makes Trouble

474

56

626

457

Linear Cellular Automata

473

56

627

556

Amazing

473

56

628

741

Burrows Wheeler Decoder

472

56

629

796

Critical Links

472

56

630

10304

Optimal Binary Search Tree

471

56

631

743

The MTM Machine

470

56

632

10689

Yet another Number Sequence

469

56

633

526

String Distance and Transform Process

467

57

634

10268

498-bis

467

57

635

10271

Chopsticks

467

57

636

162

Beggar My Neighbour

465

57

637

10126

Zipf's Law

465

57

638

627

The Net

464

57

639

584

Bowling

462

57

640

10705

The Fun Number System

462

57

641

10522

Height to Area

460

58

642

11001

Necklace

460

58

643

11150

Cola

459

58

644

10738

Riemann vs Mertens

458

58

645

705

Slash Maze

457

58

646

10820

Send a Table

457

58

647

622

Grammar Evaluation

456

58

648

10928

My Dear Neighbours

456

58

649

245

Uncompress

454

58

650

314

Robot

454

58

651

10005

Packing polygons

454

58

652

10617

Again Palindrome

451

59

653

638

Finding Rectangles

450

59

654

704

Colour Hash

450

59

655

10060

A hole to catch a man

450

59

656

10669

Three powers

450

59

657

10920

Spiral Tap

449

59

658

143

Orchard Trees

448

59

659

538

Balancing Bank Accounts

446

59

660

10132

File Fragmentation

444

60

661

10650

Determinate Prime

444

60

662

517

Word

442

60

663

551

Nesting a Bunch of Brackets

442

60

664

588

Video Surveillance

440

60

665

10307

Killing Aliens in Borg Maze

440

60

666

10309

Turn the Lights Off

439

60

667

586

Instant Complexity

438

60

668

10801

Lift Hopping

438

60

669

10090

Marbles

437

61

670

10354

Avoiding Your Boss

436

61

671

10925

Krakovia

436

61

672

168

Theseus and the Minotaur

435

61

673

209

Triangular Vertices

435

61

674

468

Key to Success

434

61

675

547

DDF

433

61

676

10022

Delta-wave

432

61

677

10721

Bar Codes

432

61

678

10337

Flight Planner

431

61

679

10460

Find the Permuted String

431

61

680

10865

Brownie Points

431

61

681

196

Spreadsheet

428

62

682

10233

Dermuba Triangle

428

62

683

10226

Hardwood Species

427

62

684

10871

Primed Subsequence

426

62

685

11039

Building designing

425

62

686

222

Budget Travel

424

62

687

10197

Learning Portuguese

422

63

688

290

Palindroms <---> smordnilaP

420

63

689

10120

Gift?!

420

63

690

756

Biorhythms

419

63

691

654

Ratio

418

63

692

833

Water Falls

418

63

693

10178

Count the Faces.

417

64

694

10503

The dominoes solitaire

417

64

695

11137

Ingenuous Cubrency

417

64

696

10541

Stripe

415

64

697

10154

Weights and Measures

414

64

698

418

Molecules

413

64

699

632

Compression (II)

413

64

700

10227

Forests

412

64

701

647

Chutes and Ladders

411

64

702

462

Bridge Hand Evaluator

410

65

703

296

Safebreaker

409

65

704

380

Call Forwarding

409

65

705

11219

How old are you?

409

65

706

501

Black Box

408

65

707

598

Bundling Newspapers

408

65

708

10896

Known Plaintext Attack

407

65

709

270

Lining Up

403

66

710

10201

Adventures in Moving - Part IV

403

66

711

10308

Roads in the North

403

66

712

10290

{Sum+=i++} to Reach N

402

66

713

10356

Rough Roads

402

66

714

321

The New Villa

401

66

715

10774

Repeated Josephus

400

66

716

10994

Simple Addition

399

66

717

177

Paper Folding

397

67

718

403

Postscript

397

67

719

10554

Calories from Fat

395

67

720

10092

The Problem with the Problem Setter

393

67

721

10325

The Lottery

393

67

722

616

Coconuts, Revisited

392

68

723

763

Fibinary Numbers

390

68

724

393

The Doors

389

68

725

10677

Base Equality

389

68

726

10776

Determine The Combination

389

68

727

815

Flooded!

388

68

728

220

Othello

387

68

729

11152

Colourful Flowers

387

68

730

10254

The Priest Mathematician

386

69

731

157

Route Finding

385

69

732

10284

Chessboard in FEN

385

69

733

10892

LCM Cardinality

384

69

734

139

Telephone Tangles

382

69

735

10453

Make Palindrome

382

69

736

10646

What is the Card?

382

69

737

10717

Mint

382

69

738

10585

Center of symmetry

381

70

739

10440

Ferry Loading II

376

70

740

11078

Open Credit System

374

71

741

10113

Exchange Rates

373

71

742

10312

Expression Bracketing

373

71

743

172

Calculator Language

372

71

744

11089

Fi-binary Number

370

72

745

10029

Edit Step Ladders

369

72

746

10543

Traveling Politician

369

72

747

10610

Gopher and Hawks

369

72

748

313

Intervals

367

72

749

897

Anagrammatic Primes

365

73

750

670

The dog task

364

73

751

10959

The Party, Part I

363

73

752

665

False coin

362

73

753

10625

GNU = GNU'sNotUnix

362

73

754

11105

Semi-prime H-numbers

362

73

755

702

The Vindictive Coach

361

73

756

10150

Doublets

359

74

757

10856

Recover Factorial

359

74

758

10387

Billiard

358

74

759

341

Non-Stop Travel

357

74

760

10603

Fill

357

74

761

10963

The Swallowing Ground

357

74

762

812

Trade on Verweggistan

356

74

763

10851

2D Hieroglyphs decoder

356

74

764

10894

Save Hridoy

355

75

765

10174

Couple-Bachelor-Spinster Numbers.

354

75

766

10313

Pay the Price

354

75

767

11115

Uncle Jack

354

75

768

137

Polygons

353

75

769

345

It's Ir-Resist-Able!

353

75

770

10181

15-Puzzle Problem

353

75

771

10806

Dijkstra, Dijkstra.

353

75

772

11220

Decoding the message.

353

75

773

11068

An Easy Task

352

75

774

181

Hearts

351

75

775

10718

Bit Mask

351

75

776

657

The die is cast

350

76

777

10401

Injured Queen Problem

350

76

778

11076

Add Again

350

76

779

11067

Little Red Riding Hood

348

76

780

10891

Game of Sum

347

76

781

614

Mapping the Route

345

77

782

10637

Coprimes

345

77

783

10679

I Love Strings!!

345

77

784

11173

Grey Codes

345

77

785

493

Rational Spiral

342

77

786

10986

Sending email

342

77

787

10912

Simple Minded Hashing

341

78

788

11056

Formula 1

341

78

789

545

Heads

339

78

790

10212

The Last Non-zero Digit.

339

78

791

10672

Marbles on a tree

339

78

792

10895

Matrix Transpose

339

78

793

548

Tree

338

78

794

871

Counting Cells in a Blob

338

78

795

11085

Back to the 8-Queens

337

79

796

427

FlatLand Piano Movers

336

79

797

710

The Game

336

79

798

11003

Boxes

336

79

799

388

Galactic Import

335

79

800

339

SameGame Simulation

334

79

801

10586

Polynomial Remains

332

80

802

10947

Bear with me, again..

332

80

803

11151

Longest Palindrome

331

80

804

11054

Wine trading in Gergovia

330

80

805

10616

Divisible Group Sums

328

81

806

349

Transferable Voting (II)

327

81

807

10382

Watering Grass

327

81

808

10576

Y2K Accounting Bug

327

81

809

10742

The New Rule in Euphomia

327

81

810

10047

The Monocycle

326

81

811

10482

The Candyman Can

326

81

812

776

Monkeys in a Regular Forest

325

81

813

10520

Determine it

325

81

814

10578

The Game of 31

325

81

815

668

Parliament

324

82

816

589

Pushing Boxes

323

82

817

732

Anagrams by Stack

323

82

818

10075

Airlines

323

82

819

150

Double Time

322

82

820

135

No Rectangles

320

83

821

10528

Major Scales

320

83

822

10830

A New Function

320

83

823

447

Population Explosion

319

83

824

565

Pizza Anyone?

318

83

825

11064

Number Theory

318

83

826

10670

Work Reduction

317

84

827

10978

Let's Play Magic!

317

84

828

557

Burger

316

84

829

10259

Hippity Hopscotch

316

84

830

10406

Cutting tabletops

316

84

831

10842

Traffic Flow

316

84

832

179

Code Breaking

315

84

833

865

Substitution Cypher

314

84

834

11042

Complex, difficult and complicated

314

84

835

11244

Counting Stars

313

85

836

10911

Forming Quiz Teams

311

85

837

11012

Cosmic Cabbages

311

85

838

302

John's trip

310

85

839

892

Finding words

310

85

840

10532

Combination! Once Again

310

85

841

10536

Game of Euler

310

85

842

10662

The Wedding

310

85

843

10720

Graph Construction

310

85

844

467

Synching Signals

309

86

845

10635

Prince and Princess

309

86

846

10296

Jogging Trails

308

86

847

10991

Region

307

86

848

520

Append

306

87

849

10574

Counting Rectangles

305

87

850

11233

Deli Deli

305

87

851

533

Equation Solver

304

87

852

10058

Jimmi's Riddles

304

87

853

10264

The Most Potent Corner

304

87

854

10333

The Tower of ASCII

304

87

855

10821

Constructing BST

304

87

856

10017

The Never Ending Towers of Hanoi

303

87

857

10261

Ferry Loading

302

88

858

11062

Andy's Second Dictionary

301

88

859

11207

The easiest way

301

88

860

633

A Chess Knight

300

88

861

10250

The Other Two Trees

300

88

862

10681

Teobaldo's Trip

300

88

863

993

Product of digits

299

89

864

10097

The Color Game

299

89

865

10862

Connect the Cable Wires

299

89

866

11045

My T-shirt suits me

298

89

867

10094

Place the Guards

297

89

868

11223

O: dah dah dah!

297

89

869

338

Long Multiplication

296

89

870

521

Gossiping

296

89

871

10167

Birthday Cake

296

89

872

10217

A Dinner with Schwarzenegger!!!

296

89

873

10555

Dead Fraction

296

89

874

10351

Cutting Diamonds

295

90

875

10083

Division

294

90

876

10203

Snow Clearing

294

90

877

171

Car Trialling

292

91

878

10957

So Doku Checker

292

91

879

276

Egyptian Multiplication

289

92

880

10771

Barbarian tribes

289

92

881

242

Stamps and Envelope Size

288

92

882

10164

Number Game

288

92

883

10785

The Mad Numerologist

288

92

884

11222

Only I did it!

288

92

885

10410

Tree Reconstruction

287

92

886

10466

How Far?

287

92

887

346

Getting Chorded

286

93

888

529

Addition Chains

286

93

889

10685

Nature

285

93

890

11086

Composite Prime

285

93

891

185

Roman Numerals

284

93

892

753

A Plug for UNIX

284

93

893

824

Coast Tracker

284

93

894

10158

War

284

93

895

10564

Paths through the Hourglass

283

94

896

10480

Sabotage

282

94

897

428

Swamp County Roofs

280

95

898

662

Fast Food

280

95

899

718

Skyscraper Floors

280

95

900

385

DNA Translation

279

95

901

523

Minimum Transport Cost

279

95

902

10232

Bit-wise Sequence

279

95

903

518

Time

278

95

904

10146

Dictionary

278

95

905

735

Dart-a-Mania

277

96

906

10557

XYZZY

277

96

907

10562

Undraw the Trees

277

96

908

10759

Dice Throwing

276

96

909

410

Station Balance

275

96

910

10187

From Dusk Till Dawn

275

96

911

11058

Encoding

275

96

912

10043

Chainsaw Massacre

274

97

913

10263

Railway

274

97

914

11093

Just Finish it up

274

97

915

452

Project Scheduling

273

97

916

10257

Dick and Jane

273

97

917

10634

Say NO to Memorization

273

97

918

10716

Evil Straw Warts Live

273

97

919

375

Inscribed Circles and Isosceles Triangles

272

97

920

10787

Modular Equations

272

97

921

10792

The Laurel-Hardy Story

272

97

922

10823

Of Circles and Squares

272

97

923

10510

Cactus

271

98

924

10328

Coin Toss

270

98

925

603

Parking Lot

269

98

926

10964

Strange Planet

269

98

927

308

Tin Cutter

268

99

928

604

The Boggle Game

267

99

929

10668

Expanding Rods

267

99

930

178

Shuffling Patience

266

100

931

433

Bank (Not Quite O.C.R.)

266

100

932

10419

Sum-up the Primes

266

100

933

10666

The Eurocup is Here!

266

100

934

10733

The Colored Cubes

266

100

935

10396

Vampire Numbers

265

100

936

10855

Rotated square

265

100

937

211

The Domino Effect

264

100

938

613

Numbers That Count

264

100

939

10495

Conic Distance

264

100

940

10626

Buying Coke

264

100

941

10902

Pick-up Sticks

264

100

942

11110

Equidivisions

264

100

943

198

Peter's Calculator

263

101

944

10917

Walk Through the Forest

263

101

945

592

Island of Logic

262

101

946

10814

Simplifying Fractions

262

101

947

837

Light and Transparencies

261

101

948

10111

Find the Winning Move

261

101

949

10428

The Roots

261

101

950

11029

Leading and Trailing

261

101

951

11221

Magic square palindromes.

261

101

952

10039

Railroads

259

102

953

158

Calendar

258

103

954

852

Deciding victory in Go

258

103

955

10505

Montesco vs Capuleto

258

103

956

10350

Liftless EME

257

103

957

10567

Helping Fill Bates

257

103

958

10816

Travel in Desert

257

103

959

10827

Maximum sum on a torus

257

103

960

10318

Security Panel

256

103

961

11100

The Trip, 2007

256

103

962

599

The Forrest for the Trees

255

104

963

10439

Temple of Dune

254

104

964

230

Borrowers

253

105

965

10804

Gopher Strategy

253

105

966

10898

Combo Deal

253

105

967

395

Board Silly

252

105

968

671

Spell checker

252

105

969

11038

How Many O's?

252

105

970

11055

Homogeneous squares

252

105

971

745

Numeric Puzzles Again!

251

106

972

10874

Segments

251

106

973

948

Fibonaccimal Base

250

106

974

10278

Fire Station

248

107

975

10843

Anne's game

248

107

976

174

Strategy

246

108

977

257

Palinwords

246

108

978

561

Jackpot

246

108

979

845

Gas Station Numbers

245

108

980

10316

Airline Hub

245

108

981

10506

The Ouroboros problem

245

108

982

487

Boggle Blitz

244

109

983

10040

Ouroboros Snake

244

109

984

303

Pipe

243

109

985

307

Sticks

243

109

986

10246

Asterix and Obelix

243

109

987

974

Kaprekar Numbers

242

109

988

10688

The Poor Giant

242

109

989

563

Crimewave

241

110

990

10560

Minimum Weight

241

110

991

11026

A Grouping Problem

241

110

992

759

The Return of the Roman Empire

240

110

993

10504

Hidden squares

240

110

994

11133

Eigensequence

240

110

995

10980

Lowest Price in Town

238

111

996

405

Message Routing

237

112

997

10317

Equating Equations

237

112

998

10357

Playball !!!

237

112

999

10547

Hidden Truth in Recurrence

237

112

1000

707

Robbery

236

112

1001

10218

Let's Dance !!!

235

113

1002

10416

Folding My T-Shirt

235

113

1003

11060

Beverages

235

113

1004

215

Spreadsheet Calculator

234

113

1005

505

Moscow time

234

113

1006

869

Airline Comparison

234

113

1007

10215

The Largest/Smallest Box ...

234

113

1008

192

Synchronous Design

233

114

1009

519

Puzzle (II)

233

114

1010

10944

Nuts for nuts..

232

114

1011

11002

Towards Zero

232

114

1012

10793

The Orc Attack

231

115

1013

10942

Can of Beans

231

115

1014

10086

Test the Rods

230

115

1015

10722

Super Lucky Numbers

230

115

1016

10745

Dominant Strings

230

115

1017

10483

The Sum Equals the Product

229

116

1018

10901

Ferry Loading III

229

116

1019

652

Eight

228

116

1020

10023

Square root

228

116

1021

10339

Watching Watches

228

116

1022

10389

Subway

228

116

1023

10421

Critical Wave

228

116

1024

10900

So you want to be a 2n-aire?

228

116

1025

10915

War on Weather

228

116

1026

11103

WFF 'N PROOF

228

116

1027

425

Enigmatic Encryption

227

117

1028

10349

Antenna Placement

227

117

1029

10593

Kites

227

117

1030

10425

Mobile Destroyer

226

117

1031

10819

Trouble of 13-Dots

226

117

1032

787

Maximum Sub-sequence Product

225

118

1033

10180

Rope Crisis in Ropeland!

225

118

1034

10288

Coupons

225

118

1035

10655

Contemplation - Algebra

225

118

1036

274

Cat and Mouse

224

118

1037

10243

Fire! Fire!! Fire!!!

224

118

1038

618

Doing Windows

222

119

1039

11049

Basic wall maze

222

119

1040

11108

Tautology

222

119

1041

298

Race Tracks

220

120

1042

10977

Enchanted Forest

220

120

1043

902

Password Search

219

121

1044

10537

The Toll! Revisited

219

121

1045

10710

Chinese Shuffle

219

121

1046

11022

String Factoring

219

121

1047

268

Double Trouble

218

121

1048

672

Gangsters

218

121

1049

10085

The most distant state

218

121

1050

11203

Can you decide it for ME?

218

121

1051

10021

Cube in the labirint

217

122

1052

10390

Bean Counting

217

122

1053

10535

Shooter

217

122

1054

658

It's not a Bug, it's a Feature!

216

123

1055

726

Decode

216

123

1056

10329

Combinatorial Expression

216

123

1057

10462

Is There A Second Way Left?

216

123

1058

10549

Russian Dolls

216

123

1059

10423

Peter Takes a Tramway

215

123

1060

10477

The Hybrid Knight

215

123

1061

415

Sunrise

214

124

1062

432

Modern Art

214

124

1063

10149

Yahtzee

214

124

1064

10320

Cow Trouble! Help Please!!

214

124

1065

182

Bonus Bonds

213

124

1066

10433

Automorphic Numbers

213

124

1067

10449

Traffic

213

124

1068

10459

The Tree Root

213

124

1069

10570

Meeting with Aliens

213

124

1070

10598

Find the Latitude

213

124

1071

10777

God! Save me

213

124

1072

10854

Number of Paths

213

124

1073

11034

Ferry Loading IV

213

124

1074

10024

Curling up the cube

212

125

1075

10471

Can't be too GREEDY

212

125

1076

10990

Another New Function

212

125

1077

914

Jumping Champion

211

126

1078

10540

Flowers of a Beautiful Mind

211

126

1079

11048

Automatic Correction of Misspellings

211

126

1080

387

A Puzzling Problem

210

126

1081

10118

Free Candies

210

126

1082

10378

Complex Numbers

210

126

1083

11231

Black and white painting

210

126

1084

451

Poker Solitaire Evaluator

209

127

1085

10385

Duathlon

209

127

1086

10746

Crime Wave - The Sequel

209

127

1087

10577

Bounding box

208

127

1088

10897

Travelling Distance

208

127

1089

858

Berry Picking

207

128

1090

312

Crosswords (II)

206

129

1091

10277

Boastin' Red Socks

206

129

1092

10445

Make Polygon

206

129

1093

570

Stats

205

129

1094

810

A Dicey Problem

205

129

1095

10342

Always Late

205

129

1096

10517

Wind of Change!

205

129

1097

10769

Pillars

205

129

1098

10958

How Many Solutions?

205

129

1099

11226

Reaching the fix-point.

205

129

1100

10386

Circles in Triangle

204

130

1101

11070

The Good Old Times

204

130

1102

10134

AutoFish

203

130

1103

10157

Expressions

203

130

1104

10475

Help the Leaders

203

130

1105

10545

Maximal Quadrilateral

203

130

1106

656

Optimal Programs

202

131

1107

10436

Cheapest way

201

132

1108

10609

Fractal

201

132

1109

10761

Broken Keyboard

201

132

1110

464

Sentence/Phrase Generator

200

132

1111

10660

Citizen attention offices

200

132

1112

10690

Expression Again

200

132

1113

11004

Changing Roadmap

200

132

1114

10343

Base64 Decoding

199

133

1115

10488

Swimming Gopher

199

133

1116

10938

Flea circus

199

133

1117

11088

End up with More Teams

199

133

1118

719

Glass Beads

198

134

1119

10464

Big Big Real Numbers

198

134

1120

760

DNA Sequencing

197

134

1121

10114

Loansome Car Buyer

197

134

1122

11130

Billiard bounces

197

134

1123

358

Don't Have A Cow, Dude

196

135

1124

607

Scheduling Lectures

196

135

1125

10269

Adventure of Super Mario

196

135

1126

10604

Chemical Reaction

196

135

1127

10734

Triangle Partitioning

196

135

1128

10927

Bright Lights

196

135

1129

10214

Trees in a Wood.

195

136

1130

10444

Multi-peg Towers of Hanoi

195

136

1131

10698

Football Sort

195

136

1132

10858

Unique Factorization

195

136

1133

10247

Complete Tree Labeling

194

137

1134

10933

Volleyball

194

137

1135

10998

Flipping Colors

194

137

1136

10068

The Treasure Hunt

193

137

1137

10348

Submarines

193

137

1138

10913

Walking on a Grid

193

137

1139

11094

Continents

193

137

1140

11155

Be Efficient

193

137

1141

10173

Smallest Bounding Rectangle

192

138

1142

10556

Biometrics

192

138

1143

309

FORCAL

191

139

1144

10160

Servicing Stations

191

139

1145

10992

The Ghost of Programmers

191

139

1146

10175

Sphere

190

139

1147

10934

Dropping water balloons

190

139

1148

247

Calling Circles

189

140

1149

10138

CDVII

189

140

1150

10426

Knights' Nightmare

189

140

1151

10544

Numbering the Paths

189

140

1152

10860

Many a Little makes a Mickle

189

140

1153

10872

Triangles

189

140

1154

11080

Place the Guards

189

140

1155

149

Forests

188

141

1156

782

Contour Painting

188

141

1157

411

Centipede Collisions

187

142

1158

721

Invitation Cards

187

142

1159

10512

A Day in Math-land

187

142

1160

10587

Mayor's posters

187

142

1161

10624

Super Number

187

142

1162

11099

Next Same-Factored

187

142

1163

10032

Tug of War

186

142

1164

10144

Expression

186

142

1165

10529

Dumb Bones

186

142

1166

10999

Crabbles

186

142

1167

11111

Generalized Matrioshkas

186

142

1168

685

Least Path Cost

185

143

1169

11204

Musical instruments

185

143

1170

559

Squares (II)

184

144

1171

653

Gizilch

184

144

1172

967

Circular

184

144

1173

10802

Lex Smallest Drive

184

144

1174

10136

Chocolate Chip Cookies

183

145

1175

10331

The Flyover Construction

183

145

1176

10461

Difference

182

146

1177

10027

Language Cardinality

181

146

1178

10687

Monitoring the Amazon

180

147

1179

10728

Help!

180

147

1180

866

Intersecting Line Segments

179

148

1181

10236

The Fibonacci Primes

179

148

1182

10516

Another Counting Problem

179

148

1183

593

MBone

178

149

1184

659

Reflections

178

149

1185

10169

Urn-ball Probabilities !

178

149

1186

10238

Throw the Dice

178

149

1187

10275

Guess the Number!

178

149

1188

10563

Least Squares

178

149

1189

10479

The Hendrie Sequence

177

150

1190

10569

Number Theory

177

150

1191

10889

The Lost Gift

177

150

1192

11077

Find the Permutations

177

150

1193

180

Eeny Meeny

176

150

1194

552

Filling the Gaps

176

150

1195

10831

Gerg's Cake

176

150

1196

625

Compression

175

151

1197

10352

Count the eWords

175

151

1198

10514

River Crossing

175

151

1199

194

Triangle

174

152

1200

335

Processing MX Records

174

152

1201

893

Y3K Problem

174

152

1202

10750

Beautiful Points

174

152

1203

10914

Abundance and Perfect Numbers

174

152

1204

366

Cutting Up

173

153

1205

610

Street Directions

173

153

1206

10366

Faucet Flow

173

153

1207

10072

Bob Laptop Woolmer and Eddie Desktop Barlow

172

154

1208

10239

The Book-shelver's Problem

172

154

1209

11132

Dice from pennies

172

154

1210

991

Safe Salutations

171

155

1211

10442

Basic

171

155

1212

11087

Divisibility Testing

171

155

1213

10228

Star not a Tree?

170

156

1214

259

Software Allocation

169

157

1215

10237

Bishops

169

157

1216

10553

Treasure Map

169

157

1217

10950

Bad Code

169

157

1218

811

The Fortified Forest

168

158

1219

10883

Supermean

168

158

1220

684

Integral Determinant

167

159

1221

10649

Danger Point

167

159

1222

10709

Intersection is Not that Easy

167

159

1223

11230

Annoying painting tool

167

159

1224

11241

Humidex

167

159

1225

10868

Bungee Jumping

166

160

1226

10882

Koerner's Pub

166

160

1227

11028

Sum of Product

166

160

1228

635

Clock solitaire

165

161

1229

10731

Test

165

161

1230

11053

Flavius Josephus Reloaded

165

161

1231

11218

KTV

165

161

1232

11236

Grocery store

165

161

1233

173

Network Wars

164

161

1234

10454

Trexpression

164

161

1235

10575

Polylops

164

161

1236

10932

Calculator

164

161

1237

10123

No Tipping

163

162

1238

10441

Catenyms

163

162

1239

10581

Partitioning for fun and profit

163

162

1240

10744

The Optimal Super-Highway

163

162

1241

328

The Finite State Text Processing Machine

162

163

1242

10559

Blocks

162

163

1243

11202

The least possible effort

162

163

1244

11240

Antimonotonicity

162

163

1245

399

Another Puzzling Problem

161

165

1246

10875

Big Math

161

165

1247

407

Gears on a Board

160

166

1248

10658

ReArrange

160

166

1249

10848

Make Palindrome Checker

160

166

1250

334

Identifying Concurrent Events

159

167

1251

10367

Equations

159

167

1252

10694

Combinatorial Summation

159

167

1253

169

Xenosemantics

158

168

1254

10648

Chocolate Box

157

169

1255

10713

Map

157

169

1256

10877

Diceoids

157

169

1257

11254

Consecutive Integers

157

169

1258

10291

Cut the Legs

155

171

1259

10355

Superman

155

171

1260

10542

Hyper-drive

155

171

1261

10870

Recurrences

155

171

1262

10987

Antifloyd

155

171

1263

10091

The Valentine's Day

154

172

1264

10225

Discrete Logging

154

172

1265

10582

ASCII Labyrinth

154

172

1266

10850

The Gossipy Gossipers Gossip Gossips

154

172

1267

10937

Blackbeard the Pirate

154

172

1268

500

Table

153

173

1269

10592

Freedom Fighter

153

173

1270

11008

Antimatter Ray Clearcutting

153

173

1271

11024

Circular Lock

153

173

1272

11148

Moliu Fractions

153

173

1273

11161

Help My Brother (II)

153

173

1274

430

Swamp County Supervisors

152

174

1275

10045

Echo

152

174

1276

10256

The Great Divide

152

174

1277

11101

Mall Mania

152

174

1278

221

Urban Elevations

151

175

1279

10973

Triangle Counting

151

175

1280

11051

Dihedral groups

151

175

1281

11158

Elegant Permuted Sum

151

175

1282

11232

Cylinder

151

175

1283

856

The Vigenère Cipher

150

177

1284

10230

Savage Garden

150

177

1285

10244

First Love !!!

150

177

1286

10413

Crazy Savages

150

177

1287

10606

Opening Doors

150

177

1288

11032

Function Overloading

150

177

1289

11170

Cos(NA)

150

177

1290

645

File Mapping

149

178

1291

10234

Frequent Substrings

149

178

1292

11138

Nuts and Bolts

149

178

1293

11140

Little Ali's Little Brother!

149

178

1294

175

Keywords

148

179

1295

10741

Magic Cube

148

179

1296

10822

Planet of the Rock, Paper and Scissors

148

179

1297

680

Movement of Reading Head

147

180

1298

10373

The Brick Stops Here

147

180

1299

10740

Not the Best

147

180

1300

10982

Troublemakers

147

180

1301

11239

Open Source

147

180

1302

419

Matching Meetings

146

181

1303

11027

Palindromic Permutation

146

181

1304

390

Letter Sequence Analysis

145

183

1305

10659

Fitting Text into Slides

145

183

1306

10707

2D-Nim

145

183

1307

10832

Yoyodyne

145

183

1308

11246

K-Multiple Free set

145

183

1309

163

City Directions

144

184

1310

757

Gone Fishing

144

184

1311

10890

Maze

144

184

1312

11227

The silver bullet.

144

184

1313

11242

Tour de France

144

184

1314

426

Fifth Bank of Swamp County

143

185

1315

716

Commedia dell' arte

143

185

1316

11136

Hoax or what

143

185

1317

11147

KuPellaKeS BST

143

185

1318

924

Spreading The News

142

187

1319

10124

Subway

142

187

1320

10909

Lucky Number

142

187

1321

669

Defragment

141

188

1322

736

Lost in Space

141

188

1323

10294

Arif in Dhaka (First Love Part 2)

141

188

1324

10412

Big Big Trees

141

188

1325

860

Entropy Text Analyzer

140

189

1326

10011

Where Can You Hide?

140

189

1327

10398

The Golden Pentagon

140

189

1328

11112

Babylonian Roulette

140

189

1329

189

Pascal Program Lengths

139

191

1330

361

Cops and Robbers

139

191

1331

453

Intersecting Circles

139

191

1332

10148

Advertisement

139

191

1333

10468

Rigid Circle Packing

139

191

1334

10807

Prim, Prim.

139

191

1335

663

Sorting Slides

138

192

1336

10590

Boxes of Chocolates Again

138

192

1337

11225

Tarot scores.

138

192

1338

560

Magic

137

193

1339

10723

Cyborg Genes

137

193

1340

10732

The Strange Research

137

193

1341

11072

Points

137

193

1342

176

City Navigation

136

195

1343

250

Pattern Matching Prelims

136

195

1344

10084

Hotter Colder

136

195

1345

10372

Leaps Tall Buildings (in a single bound)

136

195

1346

10430

Dear GOD, Pardon Me

136

195

1347

10457

Magic Car

136

195

1348

10511

Councilling

136

195

1349

10619

Advanced Causal Measurements

136

195

1350

11096

Nails

136

195

1351

10251

Min-Max Cake

135

196

1352

10486

Mountain Village

135

196

1353

10548

Find the Right Changes

135

196

1354

10552

Genealogical Research

135

196

1355

11181

Probability|Given

134

198

1356

708

Dreisam Equations

133

199

1357

10319

Manhattan

133

199

1358

10525

New to Bangladesh?

133

199

1359

10724

Road Construction

133

199

1360

10888

Warehouse

133

199

1361

10273

Eat or Not to Eat?

132

201

1362

10571

Products

132

201

1363

11021

Tribles

132

201

1364

11127

Triple-Free Binary Strings

132

201

1365

566

Adam's Genes

131

202

1366

828

Deciphering Messages

131

202

1367

10417

Gift Exchanging

131

202

1368

10644

Floor Tiles

131

202

1369

11083

Zeroes Revisited

131

202

1370

11180

Base i-1

131

202

1371

449

Majoring in Scales

130

204

1372

515

King

130

204

1373

872

Ordering

130

204

1374

10697

Firemen barracks

130

204

1375

11237

Halloween treats

130

204

1376

795

Sandorf's Cipher

129

205

1377

10076

The Bumpy Robot

129

205

1378

10388

Snap

129

205

1379

10643

Facing Problem With Trees

129

205

1380

10989

Bomb, Divide and Conquer

129

205

1381

10156

Sala-ma-Sond, A Nice Little Pond

128

207

1382

697

Jack and Jill

127

209

1383

758

The Same Game

127

209

1384

10652

Board Wrapping

127

209

1385

10715

Cat

127

209

1386

11247

Income Tax

127

209

1387

239

Tempus et mobilius. Time and motion

126

210

1388

554

Caesar Cypher

126

210

1389

10568

n Group k

126

210

1390

10725

Triangular Square

126

210

1391

11129

An antiarithmetic permutation

126

210

1392

11149

Power of Matrix

126

210

1393

835

Square of Primes

125

212

1394

844

Pousse

125

212

1395

10594

Data Flow

125

212

1396

10747

Maximum Subsequence

125

212

1397

10825

Anagram and Multiplication

125

212

1398

10923

Seven Seas

125

212

1399

240

Variable Radix Huffman Encoding

124

214

1400

962

Taxicab Numbers

124

214

1401

10089

Repackaging

124

214

1402

11047

The Scrooge Co Problem

124

214

1403

926

Walking Around Wisely

123

215

1404

11258

String Partition

123

215

1405

258

Mirror Maze

122

217

1406

10476

Spam or Not Spam

122

217

1407

10599

Robots(II)

122

217

1408

11234

Expressions

122

217

1409

553

Simply proportion

121

219

1410

775

Hamiltonian Cycle

121

219

1411

10601

Cubes

121

219

1412

10817

Headmaster's Headache

121

219

1413

11125

Arrange Some Marbles

121

219

1414

11205

The broken pedometer

121

219

1415

751

Triangle War

120

221

1416

10654

The Uxuhul Voting System

120

221

1417

10145

Lock Manager

119

223

1418

10207

The Unreal Tournament

119

223

1419

10663

Non-Powerful Subsets

119

223

1420

10692

Huge Mods

119

223

1421

10748

Knights Roaming

119

223

1422

695

Placing the Ops

118

224

1423

10799

OOPS! They did it Again...

118

224

1424

10887

Concatenation of Languages

118

224

1425

11106

Rectilinear Polygon

118

224

1426

319

Pendulum

117

226

1427

491

Tile Topology

117

226

1428

10186

Euro Cup 2000

117

226

1429

10345

Cricket/Football Goes Down

117

226

1430

10735

Euler Circuit

117

226

1431

660

Going in circles on Alpha Centauri

116

228

1432

10163

Storage Keepers

116

228

1433

10248

The Integer All-time Champ

116

228

1434

10561

Treblecross

116

228

1435

10621

Jack and Jill

116

228

1436

10665

Diatribe against Pigeonholes

116

228

1437

10764

Signed-digit numbers

116

228

1438

10844

Bloques

116

228

1439

11235

Frequent values

116

228

1440

10253

Series-Parallel Networks

115

230

1441

10262

Suffidromes

115

230

1442

10615

Rooks

115

230

1443

10708

Cheetah

115

230

1444

373

Romulan Spelling

114

232

1445

709

Formatting Text

114

232

1446

734

The Programmer's Hex

114

232

1447

765

References

114

232

1448

10028

Demerit Points

114

232

1449

10172

The Lonesome Cargo Distributor

114

232

1450

11092

IIUC HexWorld

114

232

1451

10623

Thinking Backward

113

234

1452

11134

Fabled Rooks

113

234

1453

323

Jury Compromise

112

236

1454

648

Stamps (II)

112

236

1455

830

Shark

112

236

1456

10208

Liar or Not Liar that is the...

112

236

1457

10726

Coco Monkey

112

236

1458

11036

Eventually Periodic Sequence

112

236

1459

577

WIMP

111

239

1460

851

Maze

111

239

1461

10255

The knight's Tour

111

239

1462

10292

The Gossiping System

111

239

1463

10788

Parenthesizing Palindromes

111

239

1464

11011

Numerical Methods! A Satire

111

239

1465

698

Index

110

241

1466

882

The Mailbox Manufacturers Problem

110

241

1467

989

Su Doku

110

241

1468

10053

Envelopes

110

241

1469

10117

Nice Milk

110

241

1470

10953

Stochastic Digit Generator

110

241

1471

11159

Factors and Multiples

110

241

1472

512

Spreadsheet Tracking

109

243

1473

629

Test

109

243

1474

10381

The Rock

109

243

1475

11122

Tri Tri

109

243

1476

527

The partition of a cake

108

245

1477

903

Spiral of Numbers

108

245

1478

10280

Old Wine Into New Bottles

108

245

1479

10384

The Wall Pushers

108

245

1480

10546

The Eagle's Nest

108

245

1481

10765

Doves and bombs

108

245

1482

10782

Send More Money

108

245

1483

754

Treasure Hunt

107

248

1484

911

Multinomial Coefficients

107

248

1485

10558

A Brief Gerrymander

107

248

1486

10595

Knight on the Bee Board

106

250

1487

10906

Strange Integration

106

250

1488

10993

Ignoring Digits

106

250

1489

907

Winterim Backpacking Trip

105

252

1490

10321

Polygon Intersection

105

252

1491

10463

Aztec Knights

105

252

1492

10686

SQF Problems

105

252

1493

10772

Rose windows

105

252

1494

11157

Dynamic Frog

105

252

1495

420

Supercomputer Selection, The Sequel

104

255

1496

838

Worm World

104

255

1497

10211

Divisibility Testing! Wow!

103

257

1498

261

The Window Property

102

260

1499

600

A Duckpin Tournament

102

260

1500

10448

Unique World

102

260

1501

10818

Dora Trip

102

260

1502

11200

Sapitaur's labyrinth

102

260

1503

664

Single-Player Games

101

262

1504

10866

Magic Bitstrings

101

262

1505

11035

Card Hands

101

262

1506

609

Metal Cutting

100

265

1507

682

Whoever-pick-the-last-one-lose

100

265

1508

766

Sum of powers

100

265

1509

10353

Circles in Hexagon :-)

100

265

1510

10376

Snakes

100

265

1511

10838

The Pawn Chess

100

265

1512

10122

Mysterious Mountain

99

268

1513

10647

Optimal House Placement

99

268

1514

10985

Rings'n'Ropes

99

268

1515

11090

Going in Cycle!!

99

268

1516

199

Partial differential equations

98

270

1517

715

Substitution Cipher

98

270

1518

783

Trains

98

270

1519

10661

The Perspectographer

98

270

1520

10881

Piotr's Ants

98

270

1521

814

The Letter Carrier's Rounds

97

273

1522

11191

Square

97

273

1523

197

Cube

96

276

1524

840

Deadlock Detection

96

276

1525

988

Many Paths, One Destination

96

276

1526

10185

Phylogenetic Trees Inherited

96

276

1527

10751

Chessboard

96

276

1528

10805

Cockroach Escape Networks

96

276

1529

10835

Playing with Coins

96

276

1530

11081

Strings

96

276

1531

790

Head Judge Headache

95

279

1532

10811

Up the Ante

95

279

1533

277

Cabinets

94

282

1534

10087

The Tajmahal of ++Y2k

94

282

1535

10265

Toroidal Chess Queens' Problem

94

282

1536

10794

The Deadly Olympic Returns!!!

94

282

1537

10824

Regular Polygon

94

282

1538

10979

How Many Triangles?

94

282

1539

330

Inventory Maintenance

93

285

1540

503

Parallelepiped walk

93

285

1541

10184

Equidistance

93

285

1542

10434

Working With Specific Gravity

93

285

1543

10968

KuPellaKeS

93

285

1544

11020

Efficient Solutions

93

285

1545

11104

Cousins

93

285

1546

316

Stars

92

288

1547

870

Intersecting Rectangles

92

288

1548

10418

Hyper Toy Soldiers

92

288

1549

10755

Garbage Heap

92

288

1550

10166

Travel

91

291

1551

10839

The Curse of Barbosa

91

291

1552

10956

Prime Suspect

91

291

1553

404

Radar Scopes

90

294

1554

606

Keeps Going and Going and ...

90

294

1555

799

Safari Holiday

90

294

1556

10399

Optimus Prime

90

294

1557

10962

Don Giovanni's Last Dinner

90

294

1558

10997

Medals

90

294

1559

502

DEL command

89

298

1560

676

Horse Step Maze

89

298

1561

752

Unscrambling Images

89

298

1562

817

According to Bartjens

89

298

1563

10362

Trains

89

298

1564

10627

Infinite Race

89

298

1565

10768

Planarity

89

298

1566

11082

Matrix Decompressing

89

298

1567

11228

Transportation system.

89

298

1568

11201

The problem of the crazy linguist

88

301

1569

10743

Blocks on Blocks

87

304

1570

11186

Circum Triangle

87

304

1571

398

18-Wheeler Caravans (aka Semigroups)

86

308

1572

10597

Right Words

86

308

1573

317

Hexagon

85

312

1574

421

Polygonal Puzzle

85

312

1575

848

Fmt

85

312

1576

10607

Siege

85

312

1577

10936

Land surveyor's job

85

312

1578

11131

Close Relatives

85

312

1579

722

Lakes

84

315

1580

738

A Logical Problem

84

315

1581

910

TV game

84

315

1582

10231

Matrix World

84

315

1583

10524

Matrix Reloaded

84

315

1584

10704

Traffic!

84

315

1585

288

Arithmetic Operations With Large Integers

83

319

1586

431

Trial of the Millennium

83

319

1587

689

Napoleon's Grumble

83

319

1588

899

Colour Circles

83

319

1589

927

Integer Sequences from Addition of Terms

83

319

1590

10456

Intelligent Cats

83

319

1591

832

Financial Risk

82

323

1592

10216

The Optimal Coffee Shop!!

82

323

1593

10240

The n-Dimensional Cities

82

323

1594

226

MIDI Preprocessing

81

327

1595

857

Quantiser

81

327

1596

10030

Computer Dialogue

81

327

1597

10379

Pit Stop Strategy

81

327

1598

10614

Dreadful Vectors

81

327

1599

10983

Buy one, get the rest free

81

327

1600

11162

Independent Attacking Zones

81

327

1601

11164

Kingdom Division

81

327

1602

11174

Stand in a Line

81

327

1603

310

L--system

80

331

1604

806

Spatial Structures

80

331

1605

10618

Tango Tango Insurrection

80

331

1606

11195

Another n-Queen Problem

80

331

1607

376

More Triangles ... THE AMBIGUOUS CASE

79

335

1608

929

Number Maze

79

335

1609

10133

Audubon's Stormy Arctic Trip

79

335

1610

10270

Bigger Square Please...

79

335

1611

10437

Playing With Fraction

79

335

1612

10645

Menu

79

335

1613

11031

Looking for a Subset

79

335

1614

11182

Zeroes III

79

335

1615

928

Eternal Truths

78

340

1616

10795

A Different Task

78

340

1617

11013

Get Straight

78

340

1618

11052

Economic phone calls

78

340

1619

246

10-20-30

77

344

1620

595

A Major Problem

76

348

1621

920

Sunny Mountains

76

348

1622

10274

Fans and Gems

76

348

1623

10332

The Absent Minded Professor

76

348

1624

10431

Normal Distribution

76

348

1625

10736

Series of PI

76

348

1626

10775

Mystical Matrix

76

348

1627

10826

Hot or Cold?

76

348

1628

10841

Lift Hopping in the Real World

76

348

1629

11184

Joyful Ride

76

348

1630

10526

Intellectual Property

74

358

1631

10779

Collectors Problem

74

358

1632

11043

Fast and Easy Data Compressor

74

358

1633

11166

Power Signs

74

358

1634

10159

Star

73

363

1635

10754

Fantastic Sequence

73

363

1636

229

Scanner

72

368

1637

267

Of(f) Course!

72

368

1638

692

BUT We Need a Diagram

72

368

1639

10380

Shogi Tournament

72

368

1640

10640

Planes around the World

72

368

1641

10873

Splat, Inc.

72

368

1642

10995

Educational Journey

72

368

1643

11019

Matrix Matcher

72

368

1644

11095

Tabriz City

72

368

1645

816

Abbott's Revenge

71

373

1646

10206

Stars

71

373

1647

10521

Continuously Growing Fractions

71

373

1648

10395

Titans in Danger

70

378

1649

10470

Shifted Coefficient Number System

70

378

1650

10767

Barcelona's trams

70

378

1651

10786

Qualify for the Champions League

70

378

1652

10951

Polynomial GCD

70

378

1653

10984

Double NP-hard

70

378

1654

767

Game

69

384

1655

10729

Treequivalence

69

384

1656

10798

Be wary of Roses

69

384

1657

11084

Anagram Division

69

384

1658

11117

Little Quilt

69

384

1659

286

Dead Or Not -- That Is The Question

68

389

1660

506

System Dependencies

68

389

1661

983

Localized Summing for Blurring

68

389

1662

10876

Factory Robot

68

389

1663

10981

String Morphing

68

389

1664

11160

Going Together

68

389

1665

210

Concurrency Simulator

67

395

1666

283

Compress

67

395

1667

731

Numerical Summation of a Series

67

395

1668

10760

Translation or rotation

67

395

1669

11014

Make a Crystal

67

395

1670

11245

Anti-Arithmetic-Sequence

67

395

1671

11264

Coin Collector

67

395

1672

206

Meals on Wheels Routing System

66

401

1673

10580

Ransom Note

66

401

1674

11010

Tic-Tac-Tough

66

401

1675

11116

Babel Towers

66

401

1676

234

Switching Channels

65

407

1677

578

Polygon Puzzler

65

407

1678

881

Points, Polygons and Containers

65

407

1679

10095

Saving the Planet

65

407

1680

11091

How many Knight Placing?

65

407

1681

238

Jill's Bike

64

414

1682

742

Domino Game

64

414

1683

10204

Adventures in Moving - Part V

64

414

1684

10447

Sum-up the Primes (II)

64

414

1685

10613

Mushroom Misery

64

414

1686

10711

Stitching

64

414

1687

10837

A Research Problem

64

414

1688

10904

Structural Equivalence

64

414

1689

818

Cutting Chains

63

420

1690

10472

Fastest Vs Cheapest

63

420

1691

10682

Forró Party

63

420

1692

11224

Let's swim!

63

420

1693

11249

Game

63

420

1694

10272

DDR King

62

427

1695

10358

Matrix

62

427

1696

10501

Simplified Shisen-Sho

62

427

1697

10565

Matrix

62

427

1698

10632

Pyramid

62

427

1699

11073

Euler's Totient Function

62

427

1700

826

Symbolic Numerical System

61

434

1701

10073

Constrained Exchange Sort

61

434

1702

10403

Escape from Tut's Tomb

61

434

1703

10455

Gray Code

61

434

1704

10899

Billiard again

61

434

1705

11061

Playing War

61

434

1706

365

Welfare Reform

60

441

1707

370

Bingo

60

441

1708

631

Microzoft Calendar

60

441

1709

643

Bulk Mailing

60

441

1710

859

Chinese Checkers

60

441

1711

10458

Cricket Ranking

60

441

1712

10467

Parse Tree

60

441

1713

10513

Bangladesh Sequences

60

441

1714

10612

Paper Folding

60

441

1715

10674

Tangents

60

441

1716

10859

Placing Lampposts

60

441

1717

10886

Standard Deviation

60

441

1718

10907

Art Gallery

60

441

1719

11030

Predator II

60

441

1720

11097

Poor My Problem! :-(

60

441

1721

11238

Innoumerous bowling games

60

441

1722

10109

Solving Systems of Linear Equations

59

449

1723

10322

The Four in One Stadium

59

449

1724

10712

Count the Numbers

59

449

1725

10853

Pablito nailed a nail

59

449

1726

11118

Prisoners, Boxes and Pieces of Paper

59

449

1727

11113

Continuous Fractions

58

457

1728

11168

Airport

58

457

1729

11198

Dancing Digits

58

457

1730

667

Fence

57

465

1731

10588

Queuing at the doctors

57

465

1732

10809

Great Circle

57

465

1733

10941

Words adjustment

57

465

1734

11124

Troubles for Modern Days Problemsetters

57

465

1735

11153

Museums

57

465

1736

868

Numerical Maze

56

473

1737

874

2D Representations

56

473

1738

883

Overlapping Rectangles

56

473

1739

10631

Normals

56

473

1740

10996

Go

56

473

1741

11206

Coloring the map, but not anyhow

56

473

1742

11229

Improved tic-tac-toe.

56

473

1743

10638

The Trip II

55

482

1744

10834

The Story of Two Coins

55

482

1745

10836

The Maximum Term

55

482

1746

11260

Odd Root Sum

55

482

1747

11269

Setting Problems

55

482

1748

10052

Inviting Politicians

54

490

1749

10641

Barisal Stadium

54

490

1750

10727

Practice

54

490

1751

10867

Cutting a Polygon

54

490

1752

10869

Brownie Points II

54

490

1753

10960

The Party, Part II

54

490

1754

10965

Khepel's Problem

54

490

1755

11243

Texas Trip

54

490

1756

342

HTML Syntax Checking

53

500

1757

10411

Another Game of Tetris

53

500

1758

10481

The Gift Wrappers of Hollywood

53

500

1759

11018

Mars Buggy

53

500

1760

11178

Morley's Theorem

53

500

1761

11256

Repetitive Multiple

53

500

1762

564

Gaston

52

509

1763

831

Document Validator

52

509

1764

11071

Permutation Representation

52

509

1765

11123

Counting Trapizoid

52

509

1766

957

Popes

51

519

1767

10885

Martin the Gardener

51

519

1768

10961

Chasing After Don Giovanni

51

519

1769

11261

Bishops

51

519

1770

733

Follow the Folding Dot

50

530

1771

908

Re-connecting Computer Sites

50

530

1772

986

How Many?

50

530

1773

10438

Meta Editor

50

530

1774

11120

Very Funny Mr. Feynman

50

530

1775

10335

Ray Inside a Polygon

49

541

1776

10847

Basic Tautologies

49

541

1777

11016

Square Counting

49

541

1778

11259

Coin Changing Again

49

541

1779

918

ASCII Mandelbrot

48

552

1780

972

Horizon Line

48

552

1781

10224

Return of the Jedi

48

552

1782

10498

Happiness

48

552

1783

11109

Rinse

48

552

1784

11262

Weird Fence

48

552

1785

10766

Organising the Organisation

47

564

1786

10939

Ants, Aphids and a Ladybug

47

564

1787

11165

Galactic Travel

47

564

1788

827

Buddy Memory Allocator

46

576

1789

853

DVD Subtitles

46

576

1790

873

Loan (II)

46

576

1791

960

Gaussian Primes

46

576

1792

10864

The Predator

46

576

1793

11190

Series of Powers

46

576

1794

473

Raucous Rockers

45

589

1795

678

Schedule of Taiwan Baseball League

45

589

1796

898

Hole Cutter

45

589

1797

10266

Surveying

45

589

1798

10289

A Square and Equilateral Triangles

45

589

1799

10797

Peaceful Sharing

45

589

1800

367

Halting Factor Replacement Systems

44

602

1801

611

Parallel Deadlock

44

602

1802

802

Lead or Gold

44

602

1803

10064

Travelling in another Dimension

44

602

1804

10531

Maze Statistics

44

602

1805

11107

Life Forms

44

602

1806

11128

Faulty Computer

44

602

1807

11144

S.O.S.

44

602

1808

581

Word Search Wonder

43

616

1809

842

Crossword Puzzles

43

616

1810

944

Happy Numbers

43

616

1811

10828

Back to Kernighan-Ritchie

43

616

1812

10884

Persephone

43

616

1813

11006

Wheel Good

43

616

1814

11176

Winning Streak

43

616

1815

214

Code Generation

42

631

1816

879

Circuit Nets

42

631

1817

985

Round and Round Maze

42

631

1818

10121

Legendary Pokemon

42

631

1819

10241

Semi-triangular and also Square

42

631

1820

10402

Triangle Covering

42

631

1821

10584

Text Formalization

42

631

1822

11066

Aragorn

42

631

1823

282

Rename

41

646

1824

764

Pentominos

41

646

1825

841

Snake

41

646

1826

10478

The Falling Pillars

41

646

1827

10695

Find the Point

41

646

1828

10752

Distant Jumping

41

646

1829

11017

A Greener World

41

646

1830

11175

From D to E and Back

41

646

1831

11253

Fractal

41

646

1832

10429

Mohr's Circle

40

662

1833

10749

Automobile Travelling

40

662

1834

11126

Relaxed Golf

40

662

1835

11167

Monkeys in the Emei Mountain

40

662

1836

265

Dining Diplomats

39

679

1837

546

Image Recognizer

39

679

1838

976

Bridge Building

39

679

1839

10796

Right Hand Rule

39

679

1840

11156

Continuous Drawing

39

679

1841

237

Monitoring Wheelchair Patients

38

697

1842

683

Character Decoding

38

697

1843

744

Triangular Museum

38

697

1844

822

Queue and A

38

697

1845

946

A Pile of Boxes

38

697

1846

947

Master Mind Helper

38

697

1847

11033

Help my Brother

38

697

1848

269

Counting Patterns

37

716

1849

569

Horse Shoe Scoring

37

716

1850

747

Grid Soccer

37

716

1851

804

Petri Net Simulation

37

716

1852

877

Offset Polygons

37

716

1853

990

Diving for Gold

37

716

1854

997

Show the Sequence

37

716

1855

10676

Grid Points

37

716

1856

10893

Creating Sudoku Puzzles

37

716

1857

10967

The Great Escape

37

716

1858

11065

A Gentlemen's Agreement

37

716

1859

11187

Water Crisis

37

716

1860

243

Theseus and the Minotaur (II)

36

736

1861

284

Logic

36

736

1862

655

Scrabble

36

736

1863

878

Rotating Tetris Pieces

36

736

1864

995

Super Divisible Numbers

36

736

1865

10031

Saskatchewan

36

736

1866

11255

Necklace

36

736

1867

262

Transferable Voting

35

757

1868

10671

Grid Speed

35

757

1869

10758

Journey

35

757

1870

10808

Rational Resistors

35

757

1871

10833

Lunar Forest

35

757

1872

10949

Kids in a Grid

35

757

1873

11183

Teen Girl Squad

35

757

1874

809

Bullet Hole

34

779

1875

819

Gifts Large and Small

34

779

1876

10103

Karpovich blocks

34

779

1877

10108

The Mosquito Killer Mosquitos

34

779

1878

10119

Farewell, my friend

34

779

1879

10975

Dueue's Quiz

34

779

1880

11025

Mr. And Mrs. Hamilton

34

779

1881

11210

Chinese Mahjong

34

779

1882

285

Crosswords

33

803

1883

289

A Very Nasty Text Formatter

33

803

1884

925

No more prerequisites, please!

33

803

1885

10135

Herding Frosh

33

803

1886

10414

Denki Blocks

33

803

1887

11212

Editing a Book

33

803

1888

475

Wild Thing

32

828

1889

549

Evaluating an Equations Board

32

828

1890

728

Scatter Point Plot

32

828

1891

906

Rational Neighbor

32

828

1892

10538

Powerful Magic Squares

32

828

1893

11250

Working with Small Numbers

32

828

1894

266

Stamping Out Stamps

31

854

1895

769

Magic of David Copperfield

31

854

1896

823

Stopper Stumper

31

854

1897

10770

Sokoban

31

854

1898

11007

Mini Cube

31

854

1899

11266

Equations

31

854

1900

329

PostScript Emulation

30

883

1901

904

Overlapping Air Traffic Control Zones

30

883

1902

10675

Revenge of Faucet Flow

30

883

1903

11114

Polygon Encoder

30

883

1904

359

Sex Assignments And Breeding Experiments

29

913

1905

915

Stack of Cylinders

29

913

1906

978

Lemmings Battle!

29

913

1907

10605

Mines For Diamonds

29

913

1908

10737

The Difference Engine

29

913

1909

11102

Moonshine

29

913

1910

11214

Guarding the Chessboard

29

913

1911

11252

Take Me Home (To the Place I Belong)

29

913

1912

11268

Reliable Network

29

913

1913

225

Golygons

28

946

1914

293

Bits

28

946

1915

650

Bowl

28

946

1916

890

Maze (II)

28

946

1917

10628

Quadrills

28

946

1918

10691

Subway

28

946

1919

10972

RevolC FaeLoN

28

946

1920

11037

Point of View in Flatland

28

946

1921

251

Nondeterministic Trellis Automata

27

981

1922

396

Top Dog

27

981

1923

10572

Black & White

27

981

1924

10863

Shovelling Snow

27

981

1925

11050

Construct the wall maze

27

981

1926

205

Getting There

26

1019

1927

244

Train Time

26

1019

1928

504

Random number

26

1019

1929

891

Syntrax

26

1019

1930

10153

New Horizons

26

1019

1931

10829

L-Gap Substrings

26

1019

1932

11171

SMS

26

1019

1933

11177

Fighting Against a Polygonal Monster

26

1019

1934

11267

The Hire-a-Coder Business Model

26

1019

1935

295

Fatman

25

1059

1936

979

The Abominable Triangleman

25

1059

1937

11046

Numbers and operations

25

1059

1938

687

Lattice Practices

24

1104

1939

10485

Painting with CSE

24

1104

1940

11169

Deal or No Deal

24

1104

1941

11179

Bit Stream

24

1104

1942

11196

Birthday Cake

24

1104

1943

746

Polygon Visibility

23

1152

1944

982

Cube

23

1152

1945

10435

Compare Directories

23

1152

1946

10969

Sweet Dream

23

1152

1947

11009

Geometry Once Again

23

1152

1948

11215

How Many Numbers?

23

1152

1949

730

Morse Code Generation

22

1204

1950

970

Particles

22

1204

1951

10756

HardNumbers

22

1204

1952

11209

Be Together Again and Forever

22

1204

1953

11257

New Marketing Plan

22

1204

1954

777

Codebreakers

21

1261

1955

813

Robot

21

1261

1956

912

Live From Mars

21

1261

1957

10988

From G to H and back

21

1261

1958

11146

Insurrection

21

1261

1959

212

Use of Hospital Facilities

20

1324

1960

666

Rating

20

1324

1961

10151

Spaghetti

20

1324

1962

10155

Green Eggs and Ham

20

1324

1963

11075

Collage

20

1324

1964

203

Running Lights Visibility Calculator

19

1394

1965

801

Flight Planning

19

1394

1966

905

Tacos Panchita

19

1394

1967

953

The Incredible Pile Machine

19

1394

1968

980

X-Express

19

1394

1969

11098

Battle II

19

1394

1970

11189

A Simple Pendulum

19

1394

1971

11194

Stone Grid

19

1394

1972

322

Ships

18

1471

1973

797

Two Way Traffic

18

1471

1974

807

Towers of Powers

18

1471

1975

854

Worse Code

18

1471

1976

10143

Loan

18

1471

1977

10314

Three Pigs

18

1471

1978

10753

Exponential Function

18

1471

1979

11135

Gopher that walks and swims

18

1471

1980

11251

Fractions

18

1471

1981

204

Robot Crash

17

1558

1982

249

Bang the Drum Slowly

17

1558

1983

304

Department

17

1558

1984

794

Straightest Paths

17

1558

1985

798

Tile Puzzle

17

1558

1986

829

Almost Balanced Trees

17

1558

1987

862

Origami

17

1558

1988

11023

Multisets and Sequences

17

1558

1989

11119

Chemical Attraction

17

1558

1990

11193

Infinix

17

1558

1991

207

PGA Tour Prize Money

16

1655

1992

605

The Rotating Disk

16

1655

1993

646

The Gourmet Club

16

1655

1994

723

Comment Removal

16

1655

1995

886

Named Extension Dialing

16

1655

1996

887

Revolutionary Calendar

16

1655

1997

889

Islands

16

1655

1998

10096

The Richest Man of the Universe

16

1655

1999

10762

Treasure Castle

16

1655

2000

10846

Reading time from a clock

16

1655

2001

10952

Pattern Transformations

16

1655

2002

11041

Quarter-Finals with Brazil!? No!!!

16

1655

2003

11079

What's the Time?

16

1655

2004

11142

MineSweeper II

16

1655

2005

11163

Jaguar King

16

1655

2006

223

Classifying Lots in a Subdivision

15

1766

2007

292

Presentation Error

15

1766

2008

864

Scheme Pretty-Printing

15

1766

2009

909

The BitPack Data Compression Problem

15

1766

2010

921

A Word Puzzle in the Sunny Mountains

15

1766

2011

922

Rectangle by the Ocean

15

1766

2012

10046

Fold-up Patterns

15

1766

2013

10636

Stretching Geometry

15

1766

2014

11141

Sugar Cubes

15

1766

2015

233

Package Pricing

14

1892

2016

720

Hares and Foxes

14

1892

2017

11139

Counting Quadrilaterals

14

1892

2018

996

Find the Sequence

13

2037

2019

10629

Truckin'

13

2037

2020

11197

Counting RNA sequences

13

2037

2021

11265

The Sultan's Problem

13

2037

2022

235

Typesetting

12

2207

2023

281

Rubik's Cube

12

2207

2024

690

Pipeline Scheduling

12

2207

2025

691

Triangle Partition

12

2207

2026

885

Telephone Directory Alphabetization

12

2207

2027

888

Donkey

12

2207

2028

949

Getaway

12

2207

2029

952

Uno game

12

2207

2030

954

Tetravex solver

12

2207

2031

959

Car Rallying

12

2207

2032

981

Systematic Cyclic Redundancy Check Codes

12

2207

2033

987

Maternity

12

2207

2034

10639

Square Puzzle

12

2207

2035

248

Cutting Corners

11

2408

2036

749

Machine Repair Simulation

11

2408

2037

849

Radar Tracking

11

2408

2038

955

Interpreting Old Maps

11

2408

2039

992

Customer Service Cost Evaluation

11

2408

2040

10492

Optimal Mastermind Strategy

11

2408

2041

10861

Security by Ambiguity

11

2408

2042

217

Radio Direction Finder

10

2649

2043

279

Spin

10

2649

2044

525

Milk Bottle Data

10

2649

2045

950

Tweedle Numbers

10

2649

2046

956

The Minimum Slot Machine

10

2649

2047

241

Sail Race

9

2943

2048

354

Crazy Calculator

9

2943

2049

786

Working with Relations

9

2943

2050

923

One Against Many

9

2943

2051

975

Gutenberg Clumsy Helper

9

2943

2052

10857

Easter Eggs

9

2943

2053

463

Polynomial Factorization

8

3311

2054

917

Euro 2004

8

3311

2055

919

Cutting Polyominoes

8

3311

2056

958

A Homer's Holiday

8

3311

2057

984

Finding Haplotypes

8

3311

2058

10383

Queen vs Rook

8

3311

2059

10955

Playfair Cipher

8

3311

2060

894

Juggling Trams

7

3784

2061

964

Custom Language

7

3784

2062

973

The Guessing Game

7

3784

2063

10778

Mathemagicland

7

3784

2064

10840

Multi-stage Compressor

6

4414

2065

11145

AvreniM

6

4414

2066

11154

An Octal World

6

4414

2067

11199

Equations in Disguise

6

4414

2068

219

Department of Redundancy Department

5

5297

2069

951

The Pieces of the Puzzle

5

5297

2070

10630

Millennium Ceremony

5

5297

2071

11143

Subtitles

5

5297

2072

693

Digital Racing Circuit

4

6621

2073

977

Old West Rumours

4

6621

2074

10657

Prince Frog II

4

6621

2075

10974

The Ridiculous Game

4

6621

2076

11211

Digital Logic

4

6621

2077

10971

Building Construction

3

8828

2078

11213

Flipull

3

8828

2079

11248

Frequency Hopping

3

8828

2080

961

Ambiguous or Incomplete Inductive Definitions

2

13243

2081

10059

The Hazard of CSE Department!

2

13243

2082

10757

Interpreting SQL

2

13243

2083

10966

3KP-BASH Project

2

13243

2084

236

VTAS - Vessel Traffic Advisory Service

1

26485

2085

863

Process Scheduling

1

26485

2086

896

Board Game

1

26485

2087

10781

Global Positioning System

1

26485

2088

10845

The crusades

1

26485

2089

11263

Nested Rectangles

1

26485

2090

224

Kissin' Cousins

0

Impossible

2091

228

Resource Allocation

0

Impossible

2092

252

Trucking

0

Impossible

2093

287

Text Comparsion

0

Impossible

2094

351

``Cheapest'' Scores

0

Impossible

2095

360

Don't Get Hives From This One!

0

Impossible

2096

363

Approximate Matches

0

Impossible

2097

364

Constitutional Computing

0

Impossible

2098

368

Indexing Web Pages

0

Impossible

2099

372

WhatFix Notation

0

Impossible

2100

456

Robotic Stacker

0

Impossible

2101

461

The Reservation Maker

0

Impossible

2102

470

Nasty Virus

0

Impossible

2103

472

Simultaneous Equations

0

Impossible

2104

479

Irrigation Flow Rates

0

Impossible

2105

480

Tempus Fugit

0

Impossible

2106

508

Morse Mismatches

0

Impossible

2107

509

RAID!

0

Impossible

2108

510

Optimal Routing

0

Impossible

2109

511

Do You Know the Way to San Jose?

0

Impossible

2110

513

Window Frames

0

Impossible

2111

522

Schedule Problem

0

Impossible

2112

528

The Problem of Train Setout

0

Impossible

2113

582

Randomly Wired Neural Nets

0

Impossible

2114

596

The Incredible Hull

0

Impossible

2115

597

Last Name First, Please

0

Impossible

2116

649

You Who?

0

Impossible

2117

675

Convex Hull of the Polygon

0

Impossible

2118

717

Calculating Expressions on Turing Machine

0

Impossible

2119

724

Reverse

0

Impossible

2120

761

Transform those strings

0

Impossible

2121

768

Crossword

0

Impossible

2122

770

Puncher

0

Impossible

2123

771

Flying Stars

0

Impossible

2124

772

Divide et unita

0

Impossible

2125

773

The JustaPox Language

0

Impossible

2126

774

Driving in City Squares

0

Impossible

2127

778

Recording a tape

0

Impossible

2128

779

Wily Hacker's Problem

0

Impossible

2129

780

Sentence Generator

0

Impossible

2130

781

Optimisation

0

Impossible

2131

788

One Day Tours

0

Impossible

2132

789

Indexing

0

Impossible

2133

791

Term Reductions

0

Impossible

2134

792

Program Modules

0

Impossible

2135

800

Crystal Clear

0

Impossible

2136

803

Page Selection by Keyword Matching

0

Impossible

2137

805

Polygon Intersections

0

Impossible

2138

867

Storing Images in a Sequence

0

Impossible

2139

875

Monopoly

0

Impossible

2140

876

Balanced Expressions

0

Impossible

2141

901

From Databases to XML

0

Impossible

2142

916

Dividing Land

0

Impossible

2143

930

Polynomial Roots

0

Impossible

2144

931

The Probable n-Ascendants

0

Impossible

2145

932

Checking the N-Queens Problem

0

Impossible

2146

933

Water Flow

0

Impossible

2147

934

Overlapping Areas

0

Impossible

2148

935

Smart Strategy

0

Impossible

2149

936

Mars for Sale

0

Impossible

2150

937

Kriss Kross Puzzle

0

Impossible

2151

938

Gilix

0

Impossible

2152

939

Genes

0

Impossible

2153

940

Autobiographical Numbers

0

Impossible

2154

941

Permutations

0

Impossible

2155

942

Cyclic Numbers

0

Impossible

2156

943

Number Format Translator

0

Impossible

2157

945

Loading a Cargo Ship

0

Impossible

2158

963

Spelling Corrector

0

Impossible

2159

965

Police Road Blocks

0

Impossible

2160

966

Lost Inheritances

0

Impossible

2161

968

Constellations

0

Impossible

2162

969

AlienAlgebra

0

Impossible

2163

971

Towers

0

Impossible

2164

994

POP

0

Impossible

2165

998

Dendogram

0

Impossible

2166

999

Book signatures

0

Impossible

2167

11188

A Strange Opera House

0

Impossible

2168

11208

Airplane Scheduling

0

Impossible

2169

11216

Irrigation

0

Impossible

2170

11217

Jewel Magnetizer

0

Impossible

 

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  • 无匹配

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