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list of classical problems (unsolved)


ID NAME QUALITY USERS ACC % DIFFICULTY C I
2053 Key Task   37 1188 31.78
24
22
9340 Arbitrage   37 1951 39.51
12
17
11373 Coke madness   37 3879 35.07
5
8
66 Cross-country   38 4115 64.54
11
12
151 The Courier   38 1070 35.64
22
23
526 Divisors   38 1715 43.75
14
13
709 The day of the competitors   38 1566 28.81
17
27
3261 Race Against Time   38 1181 24.86
21
21
4408 Build a Fence   38 12327 44.81
4
5
7406 Beehive Numbers   38 9215 58.91
5
9
8612 Penney Game   38 7743 67.22
4
3
10790 G-One Numbers   38 2554 47.53
17
19
14138 Amazing Factor Sequence   38 2351 37.25
11
12
5699 The last digit re-visited   39 7471 31.71
9
9
7212 Find String Roots   39 2181 34.82
12
15
8551 Colours A, B, C, D   39 2165 21.23
10
21
12474 MAXIMUM WOOD CUTTER   39 1564 41.85
15
14
15086 Land Acquisition   39 1504 29.48
24
30
15454 How to Handle the Fans   39 1530 50.54
12
11
23132 Travelling cost   39 1645 33.19
10
8
25893 Longest Perfect Increasing Subsequence   39 701 39.65
8
12
1688 A Very Easy Problem!   40 6172 49.09
12
11
2727 Army Strength   40 14567 41.23
4
4
12880 Sheep   40 2018 46.22
9
10
16420 Even Numbers   40 5279 48.05
6
5
23976 Mohib and series   40 1773 47.07
5
7
7804 Defense of a Kingdom   41 5235 25.17
10
12
16254 Running Median Again   41 1812 22.61
20
16
18532 Tree _order   41 1245 47.28
15
10
705 New Distinct Substrings   42 3898 26.83
26
25
1026 Favorite Dice   42 5494 63.86
4
21
2738 Number Guessing Game   42 4631 62.52
8
13
25942 Ball sum   42 1800 35.19
11
11
41 Play on Words   43 3314 19.59
21
24
51 Fake tournament   43 1819 26.96
18
19
5732 Paradox   43 1241 27.87
16
19
13868 Roads of NITT   43 625 29.39
24
24
3436 Histogram   44 1546 44.27
19
22
4103 Extend to Palindrome   44 2591 30.60
16
17
9805 Be Awesome As Barney Stinson   44 1860 68.30
12
13
10228 Magic Grid   44 1802 26.43
14
19
10286 DOTA HEROES   44 6108 44.87
3
5
43 Copying Books   45 2849 25.81
19
19
100 Tower of Babylon   45 3108 50.62
19
21
1702 Cleaning Robot   45 1593 34.22
27
19
4942 Integer Factorization (15 digits)   45 3695 32.76
11
11
7169 Pizza   45 6438 29.98
10
8
8545 Subset sum   45 1943 40.12
12
16
10264 Meteors   45 1637 28.08
26
30
10968 LUCIFER Number   45 1630 62.38
21
22

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