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list of classical problems (unsolved)


ID NAME QUALITY USERS ACC % DIFFICULTY C I
14956 Submerging Islands   107 4729 39.71
13
14
14929 Subsequence   2 178 12.79
10
15
25015 Subsequences with modulo   5 65 21.26
34
34
12357 Subset and upset (HARD)   4 128 40.62
21
21
8545 Subset sum   45 1943 40.12
12
16
3749 Subset Sums   74 4226 26.67
17
20
36199 Subset with all Digits   18 246 33.86
16
19
44 Substitution Cipher   3 341 13.83
17
17
3 Substring Check (Bug Funny)   9 1083 6.98
40
15
6898 Substring Problem   22 851 15.19
23
23
8222 Substrings   7 1325 30.13
24
27
8747 Substrings II   6 164 11.23
34
30
4003 Subway planning   43 18.68
18167 SubXor   76 1906 30.82
25
29
1110 Sudoku   4 541 40.17
34
1
1833 Sudoku   1 54 30.66
17
17
13980 Sudoku goblin   2 83 42.62
42
34
21360 Suffix Equal Prefix   5 546 29.37
13
13
8735 Suffix Of Cube   1 102 43.91
23530 Suffixes   1 22 19.01
17
17
9125 Suiting Weavers   91 29.52
7676 Sum of Digits   106 5038 38.80
17
20
9066 Sum of Distinct Numbers   26 360 14.77
32
32
10395 Sum of divisors!   25 2384 27.07
16
18
176 Sum of one-sequence   5 671 33.60
11
27
9569 Sum of Pairwise Products   7 841 31.50
6
13
3940 Sum of Primes   3 237 63.91
9
9
18932 Sum of primes (reverse mode)   5 23 17.53
45
45
22455 SUM OF PRODUCT   35 1081 17.71
18
21
6286 Sum of products   11 387 36.75
19
28
11840 Sum of Squares with Segment Tree   55 2087 51.04
23
19
18964 Sum of subsequences   28 22.76
10802 Sum of Tetranacci numbers   5 318 38.92
27
21
4100 Sum of Vectors   -1 103 29.60
50
34
26132 Sum the Decimal-part II   3 56 39.29
17
9
7976 Sum the Square   7 560 26.24
12
15
32192 SUMMATION   12 590 23.26
6
10
14032 Summer Game   2 38 43.38
17
17
27194 Summer Trip   7 221 23.98
10
8
15864 SUMMING   2 10 8.45
17
26
6986 Summing Slopes   61 28.79
2742 Summing Sums   17 921 19.10
16
23
1391 Summing to a Square Prime   16 1429 53.97
12
17
237 Sums in a Triangle   -13 3593 42.51
28
10
27234 Sums of 2 and 3   18 973 35.93
5
10
28288 Super Amoeba   11 204 37.34
18
16
13833 Super Borboletas World   1 14 24.32
34
34
26913 SUPER CELL   1 37 20.08
17
17
2833 Super Dice Game   1 24 9.62
17
34
21057 Super Lucky Palindromes   3 33 27.59
34
34

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