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list of classical problems (unsolved)


ID NAME QUALITY USERS ACC % DIFFICULTY C I
32088 Chessboard State 1: National Chess Tournament   5 16 24.14
42
21
32223 Ada and Lychees   3 18 22.97
42
26
32679 Ada and Roads   3 16 53.85
42
34
33048 Find Linear Recurrence   4 24 34.80
42
50
33932 Ada and Prime   5 83 22.27
42
26
37420 Anti Hash   3 37 15.45
42
42
37921 Birthday Present   3 41 32.41
42
34
40148 Distinct Cyclings   1 15 26.56
42
34
9576 Dynamic Graph Connectivity   8 328 38.05
41
38
3 Substring Check (Bug Funny)   9 1083 6.98
40
15
4948 Integer Factorization (29 digits)   8 124 14.80
40
34
1433 The Sum   2 311 17.71
39
30
5542 Counting pairs   4 135 26.54
39
36
8075 Sequence   3 59 26.63
39
39
9687 Xavier is Learning to Count   1 46 20.05
39
39
10354 Count Strings   3 29 4.44
39
39
10820 Obsession   4 39 24.38
39
39
11202 Number Theory   37 31.44
39
39
11707 Wrong directions   2 50 30.81
39
34
12908 Binary Matrix   1 19 9.48
39
34
13829 Tjandra 19th birthday present (HARD)   2 36 37.59
39
23
15165 primes triangle (II)   2 18 26.38
39
17
15336 Hello Intercal!   2 169 58.90
39
17
17125 Thor vs Frost Giants   1 190 28.28
39
28
19975 Amazing Prime Sequence (hard)   5 97 44.55
39
45
36936 K-Divisors   3 18 17.05
39
39
38389 Phasmophobia   5 30 31.58
39
39
6779 Can you answer these queries VII   21 1454 19.40
38
28
2666 Query on a tree IV   4 746 13.54
38
34
34096 Counting Divisors (general)   6 376 37.39
38
45
3109 Longest Common Prefix   4 396 25.51
38
34
6489 Finding the Kth Prime (Hard)   6 95 10.45
38
38
8073 The area of the union of circles   1 469 20.52
38
30
8820 Okret   4 51 21.61
38
34
11844 Binary Sequence of Prime Number   6 242 20.69
38
30
19301 Operators (new ver)   3 47 6.88
38
17
21640 Nested Palindromes   2 28 17.99
38
38
25458 Boxes   4 98 38.02
38
38
19543 Can you answer these queries VIII   8 216 26.27
37
35
16549 Query on a tree VI   11 558 19.80
37
27
21414 Count The Indexes 2   5 45 19.13
37
24
34118 Prime Pesticide   6 25 16.83
37
34
11469 Balanced Cow Subsets   6 445 26.49
36
31
13529 Special Graph   5 83 12.43
36
31
22303 Mau-Mau   5 78 16.67
36
17
34356 Ludic Numbers (medium)   5 61 30.32
36
39
6488 Printing some primes (Hard)   11 199 15.42
35
29
13 Hotline   2 215 16.15
34
23
85 Dice Contest   49 21.73
34
34
88 Which is Next   1 132 19.44
34
34

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