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list of classical problems (unsolved)


ID NAME QUALITY USERS ACC % DIFFICULTY C I
234 Getting Rid of the Holidays (Act I)   100 13.81
17
17
236 Converting number formats   154 40.00
1
1
238 Getting Rid of the Holidays (Act II)   85 16.32
1
1
241 Arranging the Blocks   54 12.78
261 Triangle Partitioning   205 58.33
272 Cave Exploration   43 10.19
17
1
275 The Water Ringroad   7 19.15
278 Bicycle   62 13.55
34
1
280 Lifts   45 17.61
17
1
283 Naptime   676 26.45
17
1
290 Polynomial Equations   66 21.91
17
17
293 Officers on the Beat   11 16.23
296 Teamwork is Crucial   71 29.97
318 Pythagorean Legacy   35 19.69
1
34
325 The Tall Windmills   82 22.57
34
327 Platon and Socrates   51 12.63
9
34
332 Hard Question   106 33.05
1
34
334 The Philosophical Dispute   62 37.31
17
17
351 Ha-noi!   386 42.45
1
1
363 Crane Operator   5 2.71
369 Math I   89 25.23
34
34
371 Boxes   553 35.69
1
26
374 Count maximum matrices   241 20.85
1
17
380 Bullshit Bingo   722 33.74
382 Decorate the wall   216 34.95
1
17
383 European railroad tracks   227 30.31
385 Game schedule required   156 29.07
34
1
386 Help the problem setter   105 45.45
391 Railroads   90 17.63
17
17
392 Spin   44 26.63
1
17
393 Hexagon   77 48.65
17
1
396 Hit or Miss   133 43.10
1
1
398 Roll Playing Games   121 14.67
34
17
401 Translations   137 38.07
17
34
404 Scanner   59 12.57
405 Tin Cutter   141 29.59
17
17
406 Logic   113 23.37
17
9
407 Random Number   48 29.13
17
17
412 K-path cover   186 20.48
1
50
418 Necklace   47 17.18
421 Another Road Problem   71 25.06
17
34
481 Roots of polynomial   46 27.34
17
34
484 Fossil in the Ice   453 22.40
34
17
598 Increasing Subsequences   148 34.62
34
34
677 A place for the brewery   219 28.30
17
1
682 Pairs of Integers   208 25.08
1
1
697 Matrix Words   97 24.43
1
1
700 Branch Prediction   78 19.21
17
1
702 Barn Expansion   157 23.54
1
17
729 Move your armies   80 19.85
1
1

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