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list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
2007 Another Very Easy Problem! WOW!!!   17 760 39.04
13
28
28632 Ghost Town   11 267 40.73
23
10
36789 Linear Diophantine Equation   2 9 15.83
50
50
7186 Counting Pascal   2 125 29.11
17
17
16245 Living with Courage   19 568 37.42
10
13
151 The Courier   38 1041 35.47
22
23
412 K-path cover   181 20.04
1
50
1448 3D Cover   3 91 26.87
34
26
2714 Cow Cars   5 652 37.24
14
17
36144 The Cow Gathering   2 36 25.56
17
34
7809 Cow Photographs   2 168 35.60
26
26
17539 Cows Language   4 34 41.59
21
24
5542 Counting pairs   4 131 26.46
39
36
11676 Counting diff-pairs   14 184 22.60
24
26
7022 Cow Patterns   3 114 24.64
28
28
2173 Car Plates Competition   1 253 41.54
17
17
7676 Sum of Digits   104 4821 38.58
17
20
38331 Comet Number   7 78 32.26
7
15
38365 Asacoco Prescription   2 43 19.10
17
26
38389 Phasmophobia   5 27 30.17
39
39
3505 Prime Number Theorem   25 1525 28.06
14
13
1728 Common Permutation   26 4161 46.55
6
6
4004 Exploding CPU   141 46.17
22528 Paths in a Tree   3 43 28.37
21
21
13768 An Experiment by Penny   7 603 59.67
8
14
13769 Roommate Agreement   52 1467 31.22
11
16
13780 Audition   18 642 23.95
17
17
13447 Crayon   10 121 26.43
25
28
5014 Crazy Receptionist   11 13.18
14856 Crazy Shopkeeper   2 613 33.05
17
8
12746 Colorful Circle (EASY)   5 463 20.68
28
23
10509 Cards   78 13458 34.01
4
4
25924 Cricket Selection   1 73 25.73
9
23
18408 The Valentine Confession   9 574 28.30
15
21
7034 Crashing Robots   3 161 46.42
17
1
3484 Crossbits   3 97 14.78
23
15
26928 The Crossover   9 100 16.42
22
16
66 Cross-country   38 4072 64.51
11
12
2009 Cryptography   1 142 4.80
1
34
17 The Bytelandian Cryptographer (Act I)   8 1364 41.86
15
26
18 The Bytelandian Cryptographer (Act II)   4 666 29.54
25
1
19 The Bytelandian Cryptographer (Act III)   1 128 35.70
17
26
20 The Bytelandian Cryptographer (Act IV)   2 55 26.40
21
34
5144 Cryptography Reloaded (Act I)   33 26.16
5154 Cryptography Reloaded (Act II)   31 27.89
7035 The Embarrassed Cryptographer   5 338 31.61
13
13
26315 Crazy Smoker   23 1344 35.27
4
9
3466 Another Longest Common Subsequence Problem   6 42.86
25001 Red Blue Line Segments   2 260 17.81
28
26
16778 Sir and the Guitar   6 146 54.35
4
5

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