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list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
17258 Yungom   19 33.33
7733 Happy Numbers I   89 9365 53.38
8
8
7753 Happy Numbers II   3 647 15.91
23
17
9042 HQNP Incomputable   4 45 33.55
1
9
32857 Angry Siam   4 56 34.01
30
30
4186 Break a New RSA system   1 136 35.61
4188 Amazing equality   38 13.58
4166 Four colors   1 100 21.88
50
50
4164 A conjecture of Paul Erdős   23 2246 44.04
16
14
4784 Diophantine equation   2 149 39.96
17
1
4761 Strategy game   2 39 54.84
9
17
4785 Starship   10 28.80
7946 Check Ramsey   2 8 39.13
9
9
7947 Almost square factorisation   5 120 51.97
8
11
12240 Multinomial numbers   1 19 39.76
34
17
12241 Classification from Erdős and Selfridge   5 27 17.59
28
28
5511 Heavy Sequences   -1 82 18.23
34
34
31430 Highschool Homework   6 44 21.18
21
21
1028 Hubulullu   61 8217 58.75
2
15
9515 Dwarven Sniper´s Hunting   10 56.00
34254 Huseyn and his game   14 109 29.05
6
31
15328 Hunter x Hunter   -1 71 12.91
1
17
27196 Study Room   6 435 52.16
6
8
27195 Find The Number   7 211 37.38
20
17
27198 Ballons Revisited   4 94 20.51
1
23
27194 Summer Trip   7 215 23.48
10
8
34575 A New Task for Ibrahim   7 36 51.61
4
28
36860 Epidemic Control   6 29 54.95
27
24
1784 IOICamp Sequence   1 318 12.68
1
17
25311 Candies   9 1085 35.75
6
7
16297 Sir and The ICC Ratings   22 23.00
26773 Secret Key   3 32 53.12
17
12
205 Icerink   8 12.79
15270 A plus B   1 12 6.86
34
34
15336 Hello Intercal!   2 169 59.11
39
17
1881 Instruction Decoder   2 664 50.71
17
17
13404 The Encrypted Password   166 37.36
17
17
2179 ICPC Scoreboard   1 175 29.30
17
17
18302 Identity crisis   2 217 27.97
17
17
31756 The Idol   13 18.92
50
34
16607 Sweets   3 139 31.36
26
34
16636 Journey   50 22.43
16639 Endless Knight   39 23.36
18393 Hamiltonian Cycles   1 25 17.49
17
17
11175 The Ball Game   14 2280 44.16
2
11
5159 Island Explorer   34 15.28
31897 If Chain   1 25 46.75
17
17
11952 Intergalactic Highways   3 136 28.32
17
17
20848 Interesting Game   58 45.09
362 Ignore the Garbage   1 418 43.65
1
17

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