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429C - Guess the Tree (Codeforces - Codeforces Round #245 (Div. 1) & Codeforces Round #245 (Div. 2)) categories

Category Problems Count
1 Dynamic Programming 1201
2 Greedy 598
3 Codeforces Div. 2 - E Problems 437
4 constructive algorithms 331
5 trees 201
6 bitmasks 113