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list of classical problems (unsolved)


ID NAME QUALITY USERS ACC % DIFFICULTY C I
7809 Cow Photographs   2 173 36.01
26
26
2270 Balloons in a Box   172 23.77
7034 Crashing Robots   3 172 48.02
17
1
16267 Real Numbers   2 172 17.97
26
26
16279 Escaping from escaping   4 172 29.37
12
23
19143 TRISQRS   172 38.08
28
34
1003 Little Quilt   3 171 39.89
21
11
1835 The SetStack Computer   1 171 28.92
26
17
3133 Here We Go(relians) Again   3 171 40.30
12
12
3867 Who is The Boss   171 25.29
7859 Upper Right King (Hard)   3 171 37.39
26
34
18283 Maggu and Cuteness of Strings   6 171 40.17
13
13
3106 Dictionary Subsequences   3 170 18.47
17
17
4310 Permutacja   4 170 38.96
12
17
8426 Trie Expectation   1 170 62.16
9
26
9887 Binomial coefficients   1 170 27.10
34
34
10233 Magical Bridges   9 170 27.03
29
24
1875 Cool Numbers   7 169 30.30
34
34
3322 Doubled Numbers   2 169 49.36
17
17
4532 String reduction   2 169 16.71
17
30
11947 Counting Words   2 169 26.66
17
17
15336 Hello Intercal!   2 169 58.90
39
17
68 Expression   168 28.55
1
34
200 Monodigital Representations   1 168 30.27
26
26
2883 Widget Factory   2 168 34.93
26
26
6560 N DIV PHI_N (Hard)   4 168 21.34
17
28
7296 Trees Again   5 168 47.65
21
30
13404 The Encrypted Password   168 36.28
17
17
34610 Sharmeen Loves Mozahid Loves Sharmeen [ HARD ]   14 168 42.29
6
6
36951 HowManyLis   7 168 17.44
21
22
2678 Closest distance   1 167 13.83
28
34
6956 IOI2009 Mecho   3 167 18.36
28
23
7864 Four Chips (Hard)   6 167 30.35
31
17
8063 Dividing Stones   2 167 26.30
17
17
10079 Stammering Aliens   1 167 32.18
17
17
32086 The Permutation Game Again   11 167 44.76
10
13
2743 Prefix Tiling   1 166 27.86
17
34
3111 Stabards   3 166 43.65
12
23
5466 Electronic queue   5 166 38.11
13
21
18336 Search Bit Sum   8 166 37.34
28
23
367 Empodia   2 165 27.51
17
26
8757 Coing tossing   3 165 61.61
12
34
9430 The game of 31   165 39.30
13
17
10452 Caprica Cities   3 165 38.31
26
17
12734 Seating Arrangement   7 165 60.52
6
15
14330 Power of Phi(medium)   1 165 31.20
17
26
17302 Servers   1 165 29.53
17
17
28302 Ada and Plus   6 165 44.24
13
13
34622 NICE SEQUENCES   17 165 50.66
11
13
1698 Polygonal Line Search   1 164 62.75
9
9

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