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list of classical problems (unsolved)


ID NAME QUALITY USERS ACC % DIFFICULTY C I
15650 Dark roads   27 1575 36.53
10
10
381 106 miles to Chicago   50 3222 36.51
15
14
2526 Decoding   9 1041 36.51
23
15
8844 Detection of Extraterrestrial   126 36.51
32059 Ada and Taxes   16 113 36.48
23
23
2906 GCD2   60 6869 36.48
12
11
3464 Clock   3 66 36.47
34
9
29454 Martian Colony   4 25 36.47
17
17
7019 Zig-Zag rabbit   5 596 36.47
22
19
7363 Tree Sum   5 187 36.46
42
45
23516 One day with string   10 238 36.45
7
10
37391 Development Colored   4 21 36.45
27
27
16244 Kusac   6 411 36.44
14
21
10399 Conga line   -1 369 36.43
9
9
12559 Drastic Race   51 36.42
32946 Ada and Branches   19 345 36.39
18
19
5146 Experiment on a … Cable   16 36.36
18153 Robert Langdon & The Rule of Three   3 41 36.36
23
34
19276 Peculiar Permutivores   6 36.36
20931 Square-Free Product (Hard)   2 65 36.36
17
21
21964 Golf Bot   5 85 36.36
34
27
23880 The Toy Store   3 19 36.36
17
17
35284 Digit Root   13 107 36.34
16
20
2416 Distinct Subsequences   94 3783 36.34
12
22
8333 Place-name game   75 36.34
12558 Collision Issue   73 36.33
17
1
7189 Falta Envido   1 182 36.33
17
17
28180 Sanvi Hates Palindrome   5 62 36.32
13
13
10145 Birthday Cake   7 260 36.32
12
12
1673 Ambitious Manager   4 464 36.31
17
15
27450 Changu with subsequences   8 38 36.31
17
24
11402 The Indian Connection   19 2298 36.29
8
14
3868 Total Flow   11 1398 36.29
14
13
13404 The Encrypted Password   168 36.28
17
17
16758 Divisible by 6 and 9   -1 126 36.28
21
13
12609 Different Vectors   3 43 36.27
26
34
12326 Dating Rishi   8 637 36.27
17
26
32199 Ada and Cherry   11 164 36.26
14
22
7691 Homo or Hetero   22 1676 36.26
15
11
345 Mixtures   256 9222 36.24
17
21
7336 Mastermind   493 36.24
97 Party Schedule   251 8959 36.24
14
16
18247 Arrangement Validity   11 223 36.23
17
21
1021 Aibohphobia   310 10728 36.22
12
17
8119 CIRU2   1 175 36.22
34
34
4454 Brackets II   8 417 36.21
26
24
10108 Distributing Ballot Boxes   32 1165 36.21
11
15
21132 Palindromes   1 105 36.20
17
34
17660 The Bridge to Home   5 122 36.19
23
34
5468 Going to school   9 330 36.17
17
34

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