list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
13076 Slikar   6 220 31.82
17
10
7683 Powered and Squared   8 710 27.13
19
16
32088 Chessboard State 1: National Chess Tournament   5 11 28.10
42
21
32091 Chessboard State 2: International Chess Tournament   1 6 20.00
50
17
32092 Chessboard State 3: Intergalactic Chess Tournament   1 6 61.22
50
34
368 Cobbled streets   98 5375 50.76
13
12
2816 Common Subsequences   5 217 28.61
26
34
5464 Counting triangles   3 202 28.75
6
28
6706 Making Chess Boards   25 26.15
6851 Fence   42 27.07
6732 Camels   74 41.92
6852 Fish   4 180 29.77
26
21
6926 Tree game   1 47 8.78
34
34
7025 Roads in Berland   1 123 32.74
17
34
260 Containers   3 290 45.97
17
14
6824 Flag   1 79 26.48
34
34
277 City Game   16 1272 38.83
20
21
6956 IOI2009 Mecho   3 159 18.10
28
23
6951 MP3 Player   34 28.75
6949 PIN   112 25.88
17
34
6950 A HUGE TOWER   1 123 47.23
1
34
21058 Dirty Plates   23 44.44
21057 Super Lucky Palindromes   3 27 29.63
34
34
1108 Card Trick   68 2175 50.37
21
24
10354 Count Strings   3 17 7.88
39
39
34009 Counting Child   17 379 55.63
8
10
8796 Cubist Artwork   7 643 68.37
7
9
19976 HYPERCUBES   1 111 45.31
1
17
9032 Cube Free Numbers   65 4117 31.67
12
11
8735 Suffix Of Cube   1 93 43.09
291 Cube Root   1 250 16.63
23
15
867 Perfect Cubes   11 2168 47.60
7
5
27269 Cube Numbers   29 604 30.74
9
11
4036 Cuckoo Hashing   3 151 27.58
17
6
21692 CURD PRODUCERS   6 521 42.01
15
11
7193 The Pharaoh Curse   16 25.32
10883 Customs   14 31.25
17626 Eat all the brownies !   7 1577 43.10
5
21
67 Cutting out   2 286 42.26
30
27
92 Cutting off Squares   -1 248 42.46
1
1
3877 Cvjetici   17 972 48.61
12
21
3897 Convex Polygons   2 119 30.29
17
34
19578 Chipmunks with Brain   4 77 39.05
5
9
23541 CWC-2015   8 142 17.93
17
17
19551 A Colorful world   3 87 31.64
6
1
4574 Riding in cycles   41 24.31
40148 Distinct Cyclings   8 25.00
34
34
1681 Cylinder   2 918 38.28
9
26
9509 Shortest Path on a Cylinder   11 28.78
1391 Summing to a Square Prime   16 1415 54.06
12
17

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