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list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
386 Help the problem setter   97 45.82
2136 Candy II   2 606 45.82
17
17
3832 Kruska   4 104 45.79
17
17
7107 G Key   4 81 45.79
30
1
19152 Digo Goes Training   1 227 45.74
23
17
9161 Legendre symbol   184 45.69
9
9
3249 Typesettin   2 33 45.68
1
1
8668 THE BLACK AND WHITE QUEENS   3 80 45.67
21
34
6711 Transform a Sequence   40 45.65
21636 Electric Car Rally   1 14 45.65
34
17
35150 Line Follower Robot   1 16 45.65
17
17
9012 Maximum Self-Matching   31 639 45.62
24
29
8335 Counting the teams   1 23 45.61
34
50
4195 GCD Determinant   1 263 45.60
1
34
27496 Again Eid Salami   2 125 45.60
26
34
35144 High CG Boy   4 285 45.57
5
5
869 Galactic Import   3 139 45.56
6
6
6059 Another GCD problem   331 45.56
27497 Binary Protean Number   5 141 45.52
14
15
10232 Distinct Primes   83 5772 45.50
10
9
36166 Lucifer and Magical Substrings   13 96 45.49
12
14
7217 Training for final   26 2089 45.47
8
6
20635 Dortmund Dilemma   1 19 45.45
17
34
4200 Hamster flight   13 1149 45.39
5
13
11909 C You and Me   4 86 45.38
21
21
8104 Friendly Knights   147 45.38
40459 The triangle of Pascal modulo 2   7 38 45.36
22
20
14977 Attack of the Bloons   4 362 45.35
8
8
22441 Black and White Tiles   -1 29 45.35
13
9
19976 HYPERCUBES   1 111 45.31
1
17
7561 Lexicographic position   21 45.28
15568 Fire Extinguishers   19 45.28
11515 I AM VERY BUSY   151 8257 45.25
9
11
1798 Assistance Required   14 2335 45.25
16
7
2157 Anti-Blot System   104 12910 45.24
10
5
21173 String fertilization   58 45.23
31052 PLAYGAME   6 660 45.21
3
4
10084 Fake Scoreboard   23 45.21
9034 Help Tohu   12 2275 45.20
5
23
4672 Yanu in Movie theatre   12 1673 45.17
2
27
21177 Distracted judges   7 314 45.16
15
15
109 Exchanges   1 123 45.14
34
17705 Gopu and Combinatorics on Graphs   1 83 45.12
8330 Giant fountain   1 29 45.10
1
17
20848 Interesting Game   58 45.09
21061 Yet Another Subset Sum Problem   2 44 45.09
50
50
7250 Blocks for kids   1 93 45.08
9
17
4164 A conjecture of Paul ErdÅ‘s   23 2006 45.08
16
14
7734 Twist and whirl - want to cheat   8 229 45.06
24
17
6650 Consecutive sequence   4 320 45.05
20
17

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