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list of classical problems (unsolved)


ID NAME QUALITY USERS ACC % DIFFICULTY C I
676 Sorting is not easy   9 542 39.75
19
32
60 The Gordian Dance   3 238 39.74
12
45
15256 Partition function (EASY)   8 103 39.73
22
27
11564 E 23 Stairs pattern   1 140 39.70
17
23
14956 Submerging Islands   107 4723 39.70
13
14
25780 Decreasing Number of Visible Box   18 253 39.68
16
16
7168 Termites strike back   2 19 39.66
17
34
12600 Blade Master   1 16 39.66
34
17
25893 Longest Perfect Increasing Subsequence   39 701 39.65
8
12
2853 Decode the Strings   5 432 39.64
15
17
9387 Special String   11 1113 39.63
6
19
5522 Buy Your House   17 39.62
17789 Space Bridges   27 39.60
6043 The Game   13 944 39.60
3
19
1002 Uncle Jack   13 2970 39.60
9
8
9939 Eliminate the Conflict   1 50 39.59
17
17
13789 Loving Power   4 118 39.59
12
23
27093 Branch Assignment   29 39.58
13469 FOREVER ALONE   7 95 39.58
24
24
1437 Longest path in a tree   407 20181 39.56
14
15
6818 Capital City   95 2970 39.55
20
20
9973 Problem Set Score   4 918 39.55
12
17
28304 Ada and Teams   24 890 39.52
15
15
9340 Arbitrage   37 1951 39.51
12
17
41128 Pierwiastkowanie   4 40 39.50
5
13
2171 Ambiguous Codes   1 85 39.47
14949 HELPER   13 39.47
8869 Roti Prata   63 7451 39.46
15
17
4062 Rob Mini-Safe   114 39.46
41212 Bankomat   2 36 39.45
1
1
8409 Favorite Sub Hair   3 99 39.44
26
26
26308 Get higher and higher   7 145 39.44
13
24
18425 Polynomial Multiplication   47 1751 39.40
19
22
31938 SLIS   2 145 39.39
34
34
14629 Play with Binary Numbers   4 509 39.37
8
9
34865 Scary Secret Diary   5 23 39.36
21
30
5091 Feline Olympics - Mouseball   7 600 39.35
7
15
1700 Traveling by Stagecoach   9 476 39.35
17
16
9515 Dwarven Sniper´s Hunting   18 39.34
1677 Halloween treats   10 1010 39.33
14
22
277 City Game   16 1334 39.33
20
21
9430 The game of 31   165 39.30
13
17
12240 Multinomial numbers   1 19 39.29
34
17
26132 Sum the Decimal-part II   3 56 39.29
17
9
34301 Map Exploration Cost   2 25 39.29
17
17
30 Bytelandian Blingors Network   54 3791 39.26
14
10
3901 Black and White Nim   55 39.23
7693 Environmental Engineering   38 39.23
8329 Road trip   1 82 39.22
26
26
5830 Alternating Permutations   1 65 39.22
34
34

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