list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
68 Expression   158 30.62
1
34
70 Relations   1 241 27.14
1
1
92 Cutting off Squares   -1 244 42.64
1
1
118 Rhombs   102 46.79
1
34
131 Square dance   311 50.21
1
1
180 How to pack containers   1 102 37.61
1
1
184 Automatic Teller Machines   201 33.86
1
1
185 Chase   2 213 24.57
1
26
201 The Game of Polygons   1 250 39.53
1
17
204 Sleepwalker   89 26.93
1
1
209 The Map   237 43.42
1
1
211 Primitivus recurencis   226 26.45
1
17
236 Converting number formats   149 42.82
1
1
238 Getting Rid of the Holidays (Act II)   81 16.12
1
1
274 Johnny and the Watermelon Plantation   -1 213 24.37
1
1
301 Booklets   -1 184 41.62
1
1
318 Pythagorean Legacy   27 22.22
1
34
329 Calls   2 120 28.21
1
17
332 Hard Question   100 30.63
1
34
336 Exchange Operations   1 85 19.74
1
17
351 Ha-noi!   381 42.26
1
1
362 Ignore the Garbage   1 417 43.67
1
17
366 Farmer   1 263 17.00
1
1
371 Boxes   521 35.45
1
26
374 Count maximum matrices   234 20.82
1
17
382 Decorate the wall   213 35.24
1
17
515 Collatz   1 437 43.25
1
6
1480 Let us count 1 2 3   1 67 14.55
1
34
1675 Fusion Cube   1 79 49.45
1
26
1784 IOICamp Sequence   1 317 12.72
1
17
1876 Dragon Curves   2 174 50.12
1
17
1965 Set Cover   2 25 12.42
1
17
2009 Cryptography   1 142 4.80
1
34
2038 Rectangle Tiling   2 112 41.27
1
1
2056 Rectangular Polygon   133 47.65
1
17
2529 Model Rocket Height   1 80 54.27
1
17
2649 Weird sorting   1 58 26.10
1
34
3249 Typesettin   1 33 50.00
1
1
3251 Slink   15 44.44
1
1
3394 Lagrange’s Four-Square Theorem   4 527 45.84
1
9
3909 CALCULATE POW(2004,X) MOD 29   2 272 56.82
1
17
4195 GCD Determinant   1 262 45.59
1
34
4565 What is your Logo   2 914 45.89
1
13
4871 Bridge   1 154 24.16
1
34
4951 Bridges! More bridges!   1 46 16.42
1
34
5010 Lost in Madrid   1 189 31.15
1
1
5148 Get-Together at Stockholm   1 50 46.43
1
17
5463 Bird or not bird   2 115 38.84
1
17
5725 123 Sequence   2 120 23.60
1
1
6692 B - Esperanto Lessons   1 60 62.39
1
17

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