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217A - Ice Skating (Codeforces - Codeforces Round #134 (Div. 1) & Codeforces Round #134 (Div. 2)) categories

Category Problems Count
1 DFS & BFS & Dijkstra 565
2 brute force 494
3 Codeforces Div. 2 - C Problems 460
4 graphs 291
5 dsu 116
6 dfs 2