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814D - An overnight dance in discotheque (Codeforces - Codeforces Round #418 (Div. 2)) categories

Category Problems Count
1 Dynamic Programming 1209
2 Greedy 599
3 DFS & BFS & Dijkstra 565
4 Codeforces Div. 2 - D Problems 443
5 Geometry 254
6 trees 202