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list of classical problems (unsolved)


ID NAME QUALITY USERS ACC % DIFFICULTY C I
7779 Stock Chase   76 30.19
17
17
7861 UFO   1 41 30.21
17
17
7864 Four Chips (Hard)   6 167 30.35
31
17
7868 Join   1 21 47.31
34
17
7934 Operating System Problems (Task Scheduling)   2 142 53.65
17
17
7969 A Knights’ Tale   3 80 22.93
17
17
7970 Jumping Beans   1 63 27.96
17
17
7971 The Cyber Traveling Salesman   1 38 36.00
34
17
8004 Tree Topology   2 87 46.61
1
17
8063 Dividing Stones   2 167 26.30
17
17
8100 Shifting Lights   2 229 31.20
17
17
8105 Dot Product Maximization   3 80 16.63
17
17
8106 Normalized Form   6 278 36.76
17
17
8184 Bureaucracy   2 571 29.72
6
17
8265 Zero Count   1 15 12.03
50
17
8281 Combination Of Integers   1 69 29.49
17
17
8286 Perfect Matching   92 19.19
1
17
8330 Giant fountain   1 37 43.17
1
17
8349 BRODOVI   6 620 43.77
21
17
8392 Youtube   4 234 22.99
6
17
8398 Quadratic Equation   1 605 29.01
34
17
8408 Min Max 01 Path   2 108 28.27
17
17
8418 Revenge of the squares   1 89 36.83
17
17
8419 Traversing Grid   1 341 22.86
17
17
8420 Finding Minimum   1 75 36.90
1
17
8421 Fun With Inequalities   144 37.89
17
17
8433 Revenge of the squares (variation)   1 490 49.27
17
17
8434 Kolica   2 68 40.10
34
17
8449 Plotting functions (variation)   1 24 22.14
17
17
8461 Adventure in Moving   44 28.43
17
17
8491 Messy Phone List   1 54 19.69
34
17
8495 Maximum Subset of Array   7 735 27.80
19
17
8574 Four in a row   2 23 17.12
26
17
8586 Factorial factorisation   2 45 20.18
17
17
8624 Nim-B Sum   -1 631 61.46
9
17
8625 Just The Simple Fax   1 80 42.15
34
17
8629 Stock Prices   1 103 45.70
17
17
8667 Board-Queries   1 52 21.51
17
17
8758 Cover the string   6 223 23.17
14
17
8793 Separate Points   4 125 24.17
17
17
8842 Boring Homework   3 154 42.75
17
17
8843 Complete the Set   1 57 32.13
1
17
8850 Juice Extractor   1 125 16.41
17
17
8985 Line up   19 420 51.86
16
17
9070 Lightning Conductor   3 689 34.96
9
17
9076 Hablu and Bablu   1 160 18.76
12
17
9081 Snail family problems   2 85 23.48
34
17
9097 Derangements HARD   1 120 50.00
1
17
9098 Long Common Subsequence   2 199 36.64
34
17
9104 Match the words   3 418 50.39
9
17

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