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list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
105 Alice and Bob   3 171 27.45
42
42
5151 Alice’s Cube   8 503 29.01
24
21
10565 Alice Sieve   31 5047 53.41
2
7
10401 Aliens at the train   85 4385 29.22
13
10
37053 Trailing Zeros   10 54 53.92
8
16
10471 Aliens at the train, again!   28 812 44.92
16
16
11789 Aliens at the subway   2 67 17.03
23
23
145 Aliens   2 421 29.86
34
42
8651 Alien arithmetic   1 40 18.81
1774 All Discs Considered   10 513 28.32
26
22
12107 All Possible Barns   1 32 27.89
34
34
31591 All in One   8 105 8.80
31
26
10283 ALL IZZ WELL   69 3454 31.30
17
14
14761 Almost-isosceles Pythagorean triple (easy)   1 64 41.65
13469 FOREVER ALONE   7 91 39.43
24
24
10105 Alphabet Soup   29 48.81
210 The Altars   49 16.27
17
1
5830 Alternating Permutations   1 57 38.46
34
34
27307 Alternating Sequences   62 2095 32.45
8
9
17267 Alturas de NoMeAcuerdo   2 74 62.30
17
14
34482 Allowed Factors   4 74 26.43
14
27
1671 Another Mathematical Problem   61 11.37
4881 Words on graphs   103 11.39
34
26445 Alicias Afternoon Amble   11 186 57.24
20
26
1673 Ambitious Manager   5 462 36.55
21
17
2171 Ambiguous Codes   1 80 38.22
10450 Amoeba   98 17.32
8055 Playground   276 25.75
8056 Regex Edit Distance   2 32 40.62
34
42
8057 Square Free Factorization   16 1395 41.31
7
15
8058 Soccer Teams   1 139 25.22
17
26
8059 Stocks Prediction   1 87 32.71
17
34
8061 Christmas Play   57 7742 48.27
6
4
8062 Shopping Rush   71 63.59
8063 Dividing Stones   2 164 26.14
17
17
8064 Mixing Chemicals   1 159 22.72
17
34
10228 Magic Grid   44 1784 26.31
14
19
10229 Save the Students   1 181 25.91
17
17
10230 Robbing Gringotts   53 10.96
10231 Wizarding Duel   1 73 19.16
1
1
10232 Distinct Primes   84 5832 45.49
10
9
10233 Magical Bridges   9 162 27.59
29
24
10235 Array Diversity   1 191 23.92
10236 Generations   1 54 19.35
34
34
10237 Goblin Wars   4 406 25.99
26
21
13041 The Black Riders   6 192 39.84
17
34
13042 Gandalf vs the Balrog   -2 361 50.63
1
1
13050 Entmoot   1 78 28.96
17
34
13043 The Mirror of Galadriel   33 5938 64.41
2
3
13044 Dyslexic Gollum   3 122 29.11
23
28

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