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list of classical problems (unsolved)


ID NAME QUALITY USERS ACC % DIFFICULTY C I
26350 TWO SEQUENCES PROBLEM   12 271 31.69
10
15
4259 Pilots   34 1755 31.69
17
20
18187 Ingredients   10 295 31.69
21
23
18963 Bhagat The Bit Man   10 661 31.69
5
12
5699 The last digit re-visited   39 7471 31.71
9
9
2856 Help Bob   6 278 31.72
21
23
2852 Broken Keyboard   19 1220 31.73
14
14
15634 Lennys Lucky Lotto Lists   11 239 31.74
7
14
9434 New Horizons   11 31.75
18248 Maggu’s Solar Panels   2 49 31.75
34
34
26954 k Alternating Sum   11 81 31.75
23
26
3912 Color a tree   1 298 31.76
17
34
10242 Dice on a Board   20 31.76
2139 Gossipers   3 602 31.76
21
26
9032 Cube Free Numbers   66 4167 31.77
12
11
183 Assembler circuits   61 31.78
2053 Key Task   37 1188 31.78
24
22
14892 Good Aim   -1 37 31.79
34
17
1167 Move To Invert   13 2461 31.80
8
16
3482 Alias   7 31.82
21193 Adjusting Ducks   3 67 31.82
20
27
4033 Phone List   151 7335 31.82
16
14
30738 Ada and Coins   59 865 31.85
14
22
11386 Recycled Numbers   1 198 31.86
10240 Circleland   4 713 31.90
13
17
6264 Rank of a Fraction   4 132 31.92
12
34
7760 Kids’ Wishes   1 95 31.93
34
1
8786 The Longest Chain of Domino Tiles   5 297 31.93
21
21
9967 Playing with Words   2 36 31.95
34
26
7099 Advanced Edit Distance   11 410 31.96
10
20
3306 Very Special Boxes   114 31.96
9
26
4411 Counting Expressions   29 31.96
13076 Slikar   6 233 31.96
17
10
5446 Fishing Net   176 31.96
17150 Palin Square   6 116 31.96
21
30
36861 Yet Another Perfect Square Equation   9 61 31.97
11
19
5271 A Coin Game   4 554 31.99
21
30
19551 A Colorful world   3 89 31.99
6
1
25783 Highly Spiritual Baba   10 127 31.99
19
19
25785 Ecstasy   3 68 32.00
1
1
27301 2D arrays with XOR property   4 18 32.00
23
39
6256 Inversion Count   534 18100 32.03
16
18
23938 Save the Scofield !!   17 274 32.04
17
19
328 Bishops   83 8988 32.04
14
7
31973 THE SHORTEST PATH   1 37 32.05
26
17
30396 Easy GCD   9 101 32.08
8
8
6828 Lineup   7 704 32.08
11
9
14846 Bribe the Prisoners   10 411 32.09
19
21
15498 Kawigi quote   1 25 32.11
34
34
11345 lcm addition   2 78 32.11
34
34

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