list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
8542 Modern Pocket Calculator   35 9.05
28
6
8591 Prime Permutations   5 110 30.96
28
23
11414 Combat on a tree   3 256 31.12
28
34
11443 Davids Greed   3 253 26.22
28
19
11580 A Famous Game   409 34.93
28
28
12241 Classification from ErdÅ‘s and Selfridge   5 32 19.60
28
28
12746 Colorful Circle (EASY)   5 484 20.91
28
23
13367 EVEN COUNT   8 352 23.15
28
19
13738 Happy Valentine Day (Valentine Maze Game)   3 150 36.54
28
23
14928 Pyramidal Constructions   -1 336 48.72
28
23
15148 play with prime numbers (II)   5 35 20.83
28
23
15190 MAXIMUM RARITY   6 90 35.38
28
34
15769 Enjoy Adding GP to Series   2 63 26.67
28
34
17711 Gopu and Create Collections Part Two   4 266 29.30
28
28
18094 Robert Langdon & Florence   1 181 64.31
28
23
18667 Product of factorials (hard)   3 46 27.10
28
34
19143 TRISQRS   172 38.08
28
34
19148 Kill them All   3 129 23.60
28
34
20041 Hippo and Bloody Jungle   -1 43 21.74
28
17
21642 Tsunami   3 145 40.88
28
23
21834 Sadde and His City   3 45 21.63
28
23
23806 Yossy, The King of IRYUDAT   3 48 5.51
28
39
25001 Red Blue Line Segments   2 319 19.49
28
26
25365 Hexagram   3 44 46.67
28
17
31772 Boss Baby   2 13 17.09
28
17
32843 Ada and TicTacToe   3 52 20.51
28
23
32940 Alien Language   2 74 40.77
28
34
33263 Ada and Tomel   3 42 34.51
28
28
34380 Even Semiprime Runs   4 27 63.45
28
28
34537 Prime Lover Finding   7 67 29.43
28
24
34549 Mysteriousness of a Logical Expression   7 66 10.93
28
23
34624 Longest palindrome with no adjacent duplicates   2 95 31.59
28
17
34742 Help Robin!!   16 7.87
28
28
40457 Mines of Moria   3 20 31.25
28
34
22463 Smallest Number (medium)   9 70 21.04
29
25
32257 Apoorv and Math problem   11 174 14.96
29
16
9577 Dynamic Tree Connectivity   13 655 28.76
29
28
1482 A short vacation in Disneyland   5 236 14.80
29
20
10233 Magical Bridges   9 170 27.03
29
24
20173 Counting Divisors (square)   6 489 21.76
29
38
26778 NO GCD   11 105 22.58
29
38
30785 Ada and Apple   12 209 25.05
29
23
12005 Grass Planting   11 613 45.42
29
19
2939 Query on a tree V   79 1923 28.77
29
30
9 Direct Visibility   4 267 11.65
30
21
387 Travelling tours   1 312 53.92
30
34
687 Repeats   2 982 25.39
30
38
1466 Blue Mary Needs Help Again   5 226 20.82
30
34
1479 The GbAaY Kingdom   1 136 19.18
30
38
7107 G Key   4 87 44.98
30
1

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