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437C - The Child and Toy (Codeforces - Codeforces Round #250 (Div. 2) & Codeforces Round #250 (Div. 1)) categories

Category Problems Count
1 implementation 1053
2 Greedy 598
3 Codeforces Div. 2 - C Problems 459
4 sortings 316
5 graphs 289