list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
7627 Driving Direction   10 43.75
7628 Mathematics   2 64 28.57
17
17
7629 Building Ports   42 13.07
7630 SHOPPERS   148 36.54
7632 Architecture   18 22.92
7637 Road Map   3 78 54.68
20
20
7666 Telecommunications   22 24.75
7668 Pebble Solver   15 1998 50.40
8
11
7676 Sum of Digits   105 4842 38.53
17
20
7680 Electrical Engineering   16 34.64
7683 Powered and Squared   8 711 27.13
19
16
7685 Flowers   4 309 30.16
15
24
7691 Homo or Hetero   22 1646 36.21
15
11
7692 Chemistry   69 13.87
7693 Environmental Engineering   11 23.95
7696 Encryption   3 982 36.00
17
17
7704 Civil Engineering   1 634 44.67
9
26
7709 Jumping Zippy   3 64 55.34
26
34
7718 Number of common divisors   86 6967 24.79
12
13
7733 Happy Numbers I   89 9368 53.38
8
8
7734 Twist and whirl - want to cheat   8 237 45.34
24
17
7737 Escape   55 33.85
7739 Sound   12 472 33.52
20
17
7740 Fence   18 27.69
7741 Sequence   7 802 30.18
11
23
7742 Onotole needs your help   138 10090 41.02
4
11
7745 Bingo!   749 38.70
17
1
7746 Cocircular Points   59 16.57
42
17
7753 Happy Numbers II   3 647 15.91
23
17
7757 Flowers Flourish from France   12 3158 53.04
7
2
7758 Growing Strings   173 31.84
7759 Hyperactive Girl   1 106 39.75
26
26
7760 Kids’ Wishes   1 92 31.74
34
1
7761 Jollo   3 394 39.98
17
9
7762 Electric Needs   1 23 41.30
34
17
7763 Ingenious Metro   66 67.09
7772 Help a researcher   57 47.57
7777 National Treasure   32 38.30
7778 Land Division   1 35 43.21
17
17
7779 Stock Chase   71 29.55
17
17
7782 Largest Labeled Common Ancestor   1 204 61.73
7783 Commuting Functions   44 25.22
7804 Defense of a Kingdom   39 4992 25.25
10
12
7805 Kitchen Robot   3 88 31.90
9
9
7807 The Lucky Prisoner   27 9.93
7809 Cow Photographs   2 168 35.60
26
26
7826 Tree Isomorphism   8 547 22.94
19
28
7851 Stacks of Zippy   1 17 16.80
34
34
7857 Tower Game (Hard)   59 15.07
34
34
7859 Upper Right King (Hard)   3 165 36.85
26
34

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