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246E - Blood Cousins Return (Codeforces - Codeforces Round #151 (Div. 2)) categories

Category Problems Count
1 Dynamic Programming 1210
2 DFS & BFS & Dijkstra 565
3 data structures 489
4 Codeforces Div. 2 - E Problems 439
5 Binary Search & Ternary Search 350
6 sortings 316
7 trees 202
8 Codeforces Practice List 15