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list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
25480 Invading aliens   19 18.35
2731 Inventing Test Data   4 555 24.97
15
28
14122 Inverse of Recurrence Problem With a Square Root   3 61 49.14
23
45
6256 Inversion Count   534 18105 32.03
16
18
7232 Inversion Sort   5 173 16.34
32
23
3964 Investment Money   15 627 25.73
16
17
7870 Invisible point   17 1671 42.96
4
18
50 Invitation Cards   29 1783 43.12
16
18
6956 IOI2009 Mecho   3 167 18.36
28
23
1784 IOICamp Sequence   1 325 12.80
1
17
11198 Ipad Testing   2 51 42.08
34
1
11509 IPL - CRICKET TOURNAMENT   1 83 25.84
17
17
9950 IQ Team   1 44 43.31
50
50
4421 Irreducible polynomials over GF2   64 18.04
1436 Is it a tree   339 21156 35.31
10
10
9943 Isabella Message   1 69 24.22
17
17
5159 Island Explorer   37 15.74
2274 Island Hopping   1 207 25.14
17
1
8097 Islands   73 46.82
6622 Islands and Hotel Chains   2 66 9.68
45
34
23383 ISOMORPH   29 43.52
13809 ISRANK   1 22 34.09
50
50
7356 Iterated Bitcount Function   2 36 16.47
42
34
10810 Its a Murder!   56 2404 22.16
16
16
734 Ivan and his interesting game   232 32.93
17
17
4154 IZBORI   42 26.67
16212 Jailbreak   4 80 50.24
17
12
34011 Jalil Got TLE   12 527 26.11
6
8
6187 Jane and Tarzan   7 219 24.61
15
22
31755 Januarius, The Travelling Clairvoyant   25 29.14
4226 Japan   30 1803 23.39
16
19
7427 Jara’s Legacy   85 40.21
21104 Jarin Loves New Task   6 49 38.20
21
21
55 Jasiek   3 479 28.39
21
13
1163 Java vs C ++   17 5524 22.88
14
5
2422 Jazzy Job   2 67 32.35
9
17
3752 JEDNAKOST   12 601 18.45
23
21
34623 Jeremías y sus loros   5 330 68.06
9
13
30944 Jerry and his cheese   33 23.90
17
17
226 Jewelry and Fashion   1 20 26.36
34
50
9944 Ji-Tu Problem   17 11.23
408 Jill Rides Again   2 971 34.26
9
9
9506 Jimmy´s Travel Plan   23 40.66
5160 Jinyuetuan Puzzle   45 37.70
11875 Jobs   1 362 38.94
1
17
142 Johnny and the Glue   110 38.36
17
17
274 Johnny and the Watermelon Plantation   -1 218 24.52
1
1
12409 Johnny at school   1 74 23.92
17
17
12399 Johnny Hates Climbing   3 115 23.47
21
13
12398 Johnny Listens to Music   89 34.04

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