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510C - Fox And Names (Codeforces - Codeforces Round #290 (Div. 2) & Codeforces Round #290 (Div. 1)) categories

Category Problems Count
1 Greedy 599
2 DFS & BFS & Dijkstra 565
3 Codeforces Div. 2 - C Problems 460
4 Best Problem Setters 410
5 sortings 316
6 graphs 291
7 TopologicalSort 21