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list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
105 Alice and Bob   3 179 26.74
42
42
5151 Alice’s Cube   8 516 29.30
24
21
10565 Alice Sieve   31 5079 53.39
2
7
10401 Aliens at the train   85 4482 29.27
13
10
37053 Trailing Zeros   10 60 52.00
8
16
10471 Aliens at the train, again!   28 815 44.66
16
16
11789 Aliens at the subway   2 78 18.13
23
23
145 Aliens   2 436 30.02
34
42
8651 Alien arithmetic   1 45 18.37
1774 All Discs Considered   10 523 28.49
24
20
12107 All Possible Barns   1 34 25.23
34
34
31591 All in One   8 110 8.90
31
26
10283 ALL IZZ WELL   70 3493 31.36
17
14
14761 Almost-isosceles Pythagorean triple (easy)   1 67 41.93
13469 FOREVER ALONE   7 95 39.58
24
24
10105 Alphabet Soup   31 42.57
210 The Altars   53 15.87
17
1
5830 Alternating Permutations   1 65 39.22
34
34
27307 Alternating Sequences   62 2127 32.62
8
9
17267 Alturas de NoMeAcuerdo   2 80 63.36
17
14
34482 Allowed Factors   4 77 27.64
14
27
1671 Another Mathematical Problem   69 12.36
1
17
4881 Words on graphs   108 11.94
34
26445 Alicias Afternoon Amble   11 189 57.07
20
26
1673 Ambitious Manager   4 464 36.31
17
15
2171 Ambiguous Codes   1 85 39.47
10450 Amoeba   101 17.24
8055 Playground   280 25.94
8056 Regex Edit Distance   2 36 43.00
34
42
8057 Square Free Factorization   16 1446 41.59
7
15
8058 Soccer Teams   1 144 25.54
17
26
8059 Stocks Prediction   1 91 33.33
17
34
8061 Christmas Play   57 7793 48.26
6
4
8062 Shopping Rush   73 63.26
8063 Dividing Stones   2 167 26.30
17
17
8064 Mixing Chemicals   2 187 24.16
26
34
10228 Magic Grid   44 1802 26.43
14
19
10229 Save the Students   1 183 26.08
17
17
10230 Robbing Gringotts   56 11.07
10231 Wizarding Duel   1 75 19.48
1
1
10232 Distinct Primes   85 5932 45.48
10
9
10233 Magical Bridges   9 170 27.03
29
24
10235 Array Diversity   1 192 23.96
10236 Generations   1 57 20.53
34
34
10237 Goblin Wars   4 408 25.98
26
21
13041 The Black Riders   6 196 40.10
17
34
13042 Gandalf vs the Balrog   -2 365 50.71
1
1
13050 Entmoot   1 80 29.17
17
34
13043 The Mirror of Galadriel   33 5980 64.50
2
3
13044 Dyslexic Gollum   3 124 29.11
23
28

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