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list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
5159 Island Explorer   34 15.28
9943 Isabella Message   1 67 24.08
17
17
1436 Is it a tree   337 20613 35.22
10
10
4421 Irreducible polynomials over GF2   62 18.01
9950 IQ Team   37 41.59
50
50
11509 IPL - CRICKET TOURNAMENT   1 77 25.00
17
17
11198 Ipad Testing   2 47 41.28
34
1
1784 IOICamp Sequence   1 318 12.68
1
17
6956 IOI2009 Mecho   3 162 18.09
28
23
50 Invitation Cards   29 1733 42.92
16
18
7870 Invisible point   17 1657 42.84
4
18
3964 Investment Money   15 617 25.57
16
17
7232 Inversion Sort   5 156 17.14
32
23
6256 Inversion Count   532 17161 31.69
16
18
14122 Inverse of Recurrence Problem With a Square Root   3 59 49.56
23
45
2731 Inventing Test Data   4 455 25.96
15
28
25480 Invading aliens   15 17.91
116 Intervals   5 962 22.83
21
24
5298 Interval Challenge   4 135 16.52
24
27
22331 Intersection Query   1 13 17.21
50
34
40945 Internet Spamming   4 20 29.17
17
17
2153 Internet is Faulty   64 41.34
962 Intergalactic Map   2 564 23.41
19
28
11952 Intergalactic Highways   3 136 28.32
17
17
20654 Interesting Subset   5 95 23.50
11
14
20846 Interesting Selection   5 123 43.21
13
26
20849 Interesting queries   2 44 36.32
34
34
20845 Interesting Numbers   4 218 24.02
13
5
279 Interesting number   26 820 24.08
19
24
21418 Interesting Game with Polygons   1 33 27.75
17
34
20848 Interesting Game   58 45.09
7192 Integral Maximization   1 370 38.13
50
50
4948 Integer Factorization (29 digits)   8 102 15.52
40
34
4941 Integer Factorization (20 digits)   8 561 55.71
34
30
4942 Integer Factorization (15 digits)   45 3453 32.33
11
11
1881 Instruction Decoder   2 664 50.71
17
17
9722 Insertion Sort   28 3876 30.86
12
12
28463 Insect invasion   1 16 7.99
34
34
27683 Inquire   12 752 54.59
6
4
18187 Ingredients   10 273 32.43
21
23
7763 Ingenious Metro   66 67.09
19150 Infinite Sequence   1 152 31.88
1
34
25476 Induced favoritism   1 40 28.87
17
34
9760 Indomie   3 108 47.02
26
26
7109 Indicator of progression   2 324 23.87
17
17
9119 Indiana Jones and the lost Soccer Cup   8 376 29.00
11
13
13815 India in Box   21 14.16
901 Index Generation   38 53.66
17
1
2421 Incrementing The Integer   1 50 23.55
17
50
598 Increasing Subsequences   142 34.21
34
34

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