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list of classical problems (unsolved)


ID NAME QUALITY USERS ACC % DIFFICULTY C I
10107 Cybercrime Donut Investigation   2 56 25.17
34
42
10376 String Factorization!   1 47 10.76
26
42
12352 HNumbers   2 202 27.56
23
42
15556 Count right angle triangles   3 53 24.70
34
42
16580 Query on a tree VII   2 282 18.27
42
42
19913 Counting Pythagorean Triples   3 21 14.29
26
42
20174 Counting Divisors (cube)   7 407 35.87
21
42
26561 Pair Divisible 2   2 20 10.26
42
42
26845 Daenerys wants to Conquer   2 10 48.48
42
42
33046 Factorial Modulo Prime   4 33 16.42
46
42
34379 Another Travelling Salesman Problem   2 12 12.28
50
42
34863 A Cumulative Sum Problem   5 39 22.31
34
42
35582 Fibonacci Power Sum (hard)   3 21 39.05
34
42
36668 Not So Blind Escape   2 10 30.12
34
42
37420 Anti Hash   3 37 15.45
42
42
60 The Gordian Dance   3 238 39.74
12
45
1797 Cardsharper   2 7 22.06
34
45
7363 Tree Sum   5 187 36.46
42
45
14122 Inverse of Recurrence Problem With a Square Root   3 61 49.14
23
45
15250 Swap (Hard - Level 1000)   3 6 23.47
34
45
15257 Partition function (HARD)   7 3.18
50
45
19975 Amazing Prime Sequence (hard)   5 97 44.55
39
45
34112 The Sum of Unitary Divisors   1 91 31.09
17
45
35631 Moon Safari (Extreme)   3 10 33.70
45
45
36946 March Of The King   3 16 17.24
45
45
12076 Longest Common Subsequence   6 153 4.71
45
45
18932 Sum of primes (reverse mode)   5 23 17.53
45
45
34096 Counting Divisors (general)   6 376 37.39
38
45
37422 Recurrence Power Sum   4 29 19.25
45
46
16063 Hackers   6 61 21.64
48
48
177 AB-words   1 16 1.20
50
50
226 Jewelry and Fashion   1 20 26.36
34
50
412 K-path cover   186 20.48
1
50
1477 Play with a Tree   95 15.49
17
50
1772 Find The Determinant II   102 30.63
1
50
2421 Incrementing The Integer   1 53 24.29
17
50
2648 Archiver   1 47 13.74
34
50
2946 Eclipse   1 24 9.76
50
50
3644 Winning Strategy   1 35 18.40
17
50
3948 Polynomial Evaluation - Angry Teacher   -1 31 15.10
50
50
3980 Point Visible   1 48 27.40
34
50
4189 Landing   1 8 4.08
50
50
4669 Cross Mountain Climb Extreme   1 36 16.43
34
50
5638 Mobile Service Hard   1 91 22.09
50
50
5902 Tri   1 79 20.26
34
50
6408 Counting Triangles 2   -1 66 34.52
50
50
7192 Integral Maximization   1 375 38.35
50
50
8074 God of Number Theory   1 35 37.10
34
50
8283 Non-Decreasing Numbers   2 31 20.49
50
50
8318 color the balls   69 42.80
50
50

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