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list of classical problems (unsolved)


ID NAME QUALITY USERS ACC % DIFFICULTY C I
34648 Seven   5 45 44.44
11
21
37387 Modulo Sequence   8 57 14.71
21
21
40459 The triangle of Pascal modulo 2   9 43 52.87
23
21
41507 GCD Product Sum   8 52 31.17
9
21
100 Tower of Babylon   45 3108 50.62
19
21
1799 The Bottom of a Graph   50 1736 32.48
21
21
365 Phidias   25 1226 47.23
13
21
1724 Counting Triangles   69 13198 33.99
7
21
345 Mixtures   256 9226 36.24
17
21
3261 Race Against Time   38 1181 24.86
21
21
4181 MELE3   19 617 42.70
20
21
10285 Why this kolaveri di   21 1430 53.20
12
21
1716 Can you answer these queries III   236 12150 43.84
22
21
277 City Game   16 1338 39.37
20
21
3752 JEDNAKOST   12 601 18.45
23
21
4168 Square-free integers   14 789 46.29
16
21
19568 Prime queries   10 448 22.91
27
21
3643 Traffic Network   89 2120 18.30
18
21
2713 Can you answer these queries IV   60 4393 17.76
21
21
9040 Tug of War   12 623 25.80
9
21
10237 Goblin Wars   4 408 25.98
26
21
14846 Bribe the Prisoners   10 411 32.09
19
21
15561 Find Number Of Pair of Friends   11 469 32.15
23
21
18176 FRIENDSHIP!!!   16 631 26.94
15
21
18247 Arrangement Validity   11 223 36.23
17
21
25178 Elegant Permuted Sum   8 139 35.67
14
21
26646 An easy Problem   8 69 55.22
13
21
27000 Shoot and kill   12 336 23.81
21
21
27379 Unique Code   22 130 19.74
21
21
31428 Fibonacci Polynomial   10 136 36.75
19
21
32058 Harbinger vs Sciencepal   16 175 35.54
17
21
36563 Hard Fibonacci   8 94 24.80
19
21
8551 Colours A, B, C, D   39 2165 21.23
10
21
22455 SUM OF PRODUCT   35 1081 17.71
18
21
22268 Euler Totient Function Sieve   29 409 19.57
23
21
32745 Ada and Harvest   20 294 27.29
22
21
3978 Distance Query   71 1954 33.24
24
21
35674 COLORFUL ARRAY   65 1789 41.38
20
21
1026 Favorite Dice   42 5494 63.86
4
21
15620 Postering   16 737 34.00
16
21
913 Query on a tree II   118 4791 20.97
23
21
3405 Almost Shortest Path   79 1714 31.37
22
21
138 Election Posters   65 2343 25.84
20
21
8725 Closest Point Pair   30 2068 20.75
18
21
30734 Ada and Orange Tree   30 398 23.35
22
21
1684 Frequent values   112 3997 27.66
20
21
101 Fishmonger   48 2318 38.19
17
21
148 Land for Motorways   3 215 41.02
17
21
347 Lazy Cows   4 271 28.54
27
21
390 Billiard   1 903 54.53
11
21

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