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list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
26176 HARRY POTTER AND THE FORBIDDEN FOREST   4 87 27.56
24
12
16046 Help Professor   6 402 47.67
8
15
17258 Yungom   21 38.27
7733 Happy Numbers I   89 9403 53.36
8
8
7753 Happy Numbers II   3 651 15.95
23
17
9042 HQNP Incomputable   4 48 33.33
1
9
32857 Angry Siam   4 62 34.21
30
30
4186 Break a New RSA system   1 138 34.12
4188 Amazing equality   43 14.08
4166 Four colors   2 104 22.01
42
42
4164 A conjecture of Paul Erdős   25 2700 43.76
16
14
4784 Diophantine equation   3 155 40.59
26
17
4761 Strategy game   2 44 55.64
9
17
4785 Starship   16 31.25
7946 Check Ramsey   2 13 19.48
9
9
7947 Almost square factorisation   5 123 52.29
8
11
12240 Multinomial numbers   1 19 39.29
34
17
12241 Classification from Erdős and Selfridge   5 32 19.60
28
28
5511 Heavy Sequences   -1 84 18.41
34
34
31430 Highschool Homework   6 52 21.49
21
21
1028 Hubulullu   61 8257 58.72
2
15
9515 Dwarven Sniper´s Hunting   18 39.34
34254 Huseyn and his game   14 111 29.39
6
31
15328 Hunter x Hunter   -1 74 13.42
1
17
27196 Study Room   6 444 52.32
6
8
27195 Find The Number   7 217 37.66
20
17
27198 Ballons Revisited   4 99 21.33
1
23
27194 Summer Trip   7 221 23.98
10
8
34575 A New Task for Ibrahim   6 39 52.48
4
28
36860 Epidemic Control   6 36 58.59
27
24
1784 IOICamp Sequence   1 325 12.80
1
17
25311 Candies   9 1096 35.86
6
7
16297 Sir and The ICC Ratings   28 22.67
26773 Secret Key   3 38 56.94
17
12
205 Icerink   8 12.22
15270 A plus B   1 12 5.53
34
34
15336 Hello Intercal!   2 169 58.90
39
17
1881 Instruction Decoder   2 668 50.81
17
17
13404 The Encrypted Password   168 36.28
17
17
2179 ICPC Scoreboard   1 180 29.76
17
17
18302 Identity crisis   2 223 28.37
17
17
31756 The Idol   18 19.83
50
34
16607 Sweets   3 177 33.03
26
34
16636 Journey   59 26.42
16639 Endless Knight   57 25.82
18393 Hamiltonian Cycles   1 27 17.67
17
17
11175 The Ball Game   15 2291 44.10
2
12
5159 Island Explorer   37 15.74
31897 If Chain   1 27 46.53
17
17
11952 Intergalactic Highways   3 152 29.08
17
17

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