list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
3133 Here We Go(relians) Again   3 171 40.30
12
12
3253 Electronic Document Security   3 156 61.07
23
6
3385 Yoda Goes Palindromic !   3 586 30.53
17
17
3389 The Knights of the Round Circle   3 451 66.86
6
23
3459 SkyScrapers   3 375 38.37
17
17
3464 Clock   3 66 36.47
34
9
3484 Crossbits   3 99 15.25
23
15
3565 Choosing Gloves   3 89 23.25
17
34
3576 Boy Scouts   3 145 28.31
21
30
3577 Parity   3 83 19.98
17
34
3591 Patting Heads   3 659 35.33
17
17
3865 Reljef   3 94 39.09
26
17
3870 Military Story   3 286 28.81
21
12
3902 Fight with functions   3 21 6.47
42
34
3932 Point Connection Game in a Circle   3 768 35.47
13
21
3940 Sum of Primes   3 237 63.91
9
9
3983 Right Triangle Counting   3 190 17.72
30
21
3999 FROGGER   3 104 26.72
28
23
4036 Cuckoo Hashing   3 152 27.39
17
6
4227 "Shortest" pair of paths   3 214 41.11
23
17
4302 (K,N)-Knight   3 315 25.20
14
24
4305 Drilling   3 121 20.15
17
34
4413 Gem   3 99 40.00
23
12
4457 Shopping II   3 153 35.05
17
1
4565 What is your Logo   3 920 46.03
1
13
4667 Gremlins   3 56 29.10
28
34
4784 Diophantine equation   3 155 40.59
26
17
4839 Ant   3 194 38.89
23
28
5464 Counting triangles   3 213 29.16
6
28
5649 Divide Polygon   3 48 22.95
9
34
5969 Finding Maximum   3 109 30.31
13
23
6041 Mountain Walking   3 481 42.72
9
1
6325 Many polygons   3 202 26.44
12
17
6477 Bowling   3 526 28.74
8
11
6726 Goldbach graphs   3 35 57.14
17
17
6805 Counter attack   3 177 60.98
17
17
6956 IOI2009 Mecho   3 167 18.36
28
23
7022 Cow Patterns   3 128 26.15
28
28
7034 Crashing Robots   3 171 47.90
17
1
7187 Dinosaur Menace   3 184 8.83
17
34
7239 Cells   3 81 47.22
17
9
7335 Spheres   3 129 9.54
17
39
7426 Imperial Units   3 506 45.76
3
12
7637 Road Map   3 79 54.90
20
20
7696 Encryption   3 1004 35.88
17
17
7709 Jumping Zippy   3 68 54.35
26
34
7753 Happy Numbers II   3 651 15.95
23
17
7761 Jollo   3 398 40.15
17
9
7805 Kitchen Robot   3 90 32.24
9
9
7859 Upper Right King (Hard)   3 171 37.39
26
34

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