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list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
105 Alice and Bob   3 165 27.12
42
42
5151 Alice’s Cube   8 501 28.99
24
21
10565 Alice Sieve   31 5005 53.34
2
7
10401 Aliens at the train   85 4351 29.25
13
10
37053 Trailing Zeros   10 54 53.92
8
16
10471 Aliens at the train, again!   28 811 45.00
16
16
11789 Aliens at the subway   2 67 17.03
23
23
145 Aliens   2 419 29.78
34
42
8651 Alien arithmetic   1 40 18.81
1774 All Discs Considered   10 513 28.52
26
22
12107 All Possible Barns   1 32 27.89
34
34
31591 All in One   7 104 8.70
31
24
10283 ALL IZZ WELL   69 3418 31.23
17
14
14761 Almost-isosceles Pythagorean triple (easy)   1 64 41.65
13469 FOREVER ALONE   7 91 39.43
24
24
10105 Alphabet Soup   28 50.00
210 The Altars   46 15.72
17
1
5830 Alternating Permutations   1 54 39.39
34
34
27307 Alternating Sequences   62 2086 32.41
8
9
17267 Alturas de NoMeAcuerdo   2 70 62.07
17
14
34482 Allowed Factors   4 74 26.43
14
27
1671 Another Mathematical Problem   60 11.37
4881 Words on graphs   103 11.39
34
26445 Alicias Afternoon Amble   11 185 57.17
20
26
1673 Ambitious Manager   5 460 36.49
21
17
2171 Ambiguous Codes   1 63 34.57
10450 Amoeba   98 17.32
8055 Playground   276 25.75
8056 Regex Edit Distance   1 32 43.16
34
34
8057 Square Free Factorization   16 1383 41.43
7
15
8058 Soccer Teams   1 139 25.22
17
26
8059 Stocks Prediction   1 87 32.71
17
34
8061 Christmas Play   57 7718 48.23
6
4
8062 Shopping Rush   71 63.59
8063 Dividing Stones   2 164 26.14
17
17
8064 Mixing Chemicals   1 155 22.96
17
34
10228 Magic Grid   44 1781 26.31
14
19
10229 Save the Students   1 179 25.82
17
17
10230 Robbing Gringotts   53 10.96
10231 Wizarding Duel   1 73 19.16
1
1
10232 Distinct Primes   83 5772 45.50
10
9
10233 Magical Bridges   9 162 27.63
29
24
10235 Array Diversity   1 191 23.92
10236 Generations   1 54 19.35
34
34
10237 Goblin Wars   4 404 25.94
26
21
13041 The Black Riders   6 186 40.37
17
34
13042 Gandalf vs the Balrog   -2 360 50.59
1
1
13050 Entmoot   1 78 28.96
17
34
13043 The Mirror of Galadriel   33 5902 64.48
2
3
13044 Dyslexic Gollum   3 122 29.14
23
28

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