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list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
11676 Counting diff-pairs   14 210 21.52
24
26
6500 Counting Diameter   38 28.21
9547 Counting d-pairs   2 138 30.45
23
28
34009 Counting Child   18 467 55.71
7
9
9570 Counting binary strings   7 340 53.14
17
24
4407 Counting Arborescence   101 34.02
12943 Counting   5 82 46.93
8
30
26799 Counter-Smack   3 63 20.65
12
23
6805 Counter attack   3 177 60.98
17
17
1704 Countdown   306 25.66
22
8
11813 Count weighted paths   1 23 40.00
21414 Count The Indexes 2   5 45 19.13
37
24
20673 Count The Indexes   7 253 29.66
17
30
27268 Count Subsets   19 222 45.65
10
22
10354 Count Strings   3 29 4.44
39
39
15556 Count right angle triangles   3 53 24.70
34
42
16062 Count Primes   -2 45 25.20
10463 COUNT PAREN   4 194 60.61
20
21
35140 Count Pairs   7 67 26.12
21
24
302 Count on Cantor   155 13081 61.26
13
14
11482 Count on a trie   78 12.38
42
50
10707 Count on a tree II   70 3559 19.62
31
30
10628 Count on a tree   63 2639 17.43
32
31
12964 Count on a treap   10 30.99
2670 Count Minimum Spanning Trees   4 189 17.41
28
39
374 Count maximum matrices   241 20.85
1
17
27303 Count Doubles   3 629 34.48
7
5
8363 COSTLY CHESS   23 1772 43.12
14
12
8980 Cost   48 1265 29.14
18
26
28457 Correlations   5 94 29.40
9
13
264 Corporative Network   14 612 25.41
17
19
26314 Corn Headache   7 362 35.04
8
9
3078 Copying DNA   48 21.17
43 Copying Books   45 2849 25.81
19
19
18165 Coprime Pairs   15 16.67
15566 Coprime Again   7 73 26.66
27
34
17624 Cooperation in geometry !   24 11.95
22532 Cool Problem   1 21 55.32
1
17
1875 Cool Numbers   7 169 30.30
34
34
7023 Cookies   19 28.80
3897 Convex Polygons   2 124 30.86
17
34
760 Convex Hull 3D   126 41.31
236 Converting number formats   154 40.00
1
1
3970 Convert to Decimal Base System   56 37.34
17
17
1285 Continuous Fractions Again   5 376 41.86
15
10
996 Continuous Fractions   1 279 37.54
9
9
13398 Contest Hall Preparation   1 341 43.42
15
12
10447 Contaminated City   70 13.74
260 Containers   3 298 46.22
17
14
17707 Constructible Regular Polygons   5 511 55.88
8
8

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