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79C - Beaver (Codeforces - Codeforces Beta Round #71) categories

Category Problems Count
1 Dynamic Programming 1206
2 Greedy 599
3 data structures 489
4 Codeforces Div. 2 - C Problems 460
5 Best Problem Setters 410
6 strings 216
7 two pointers 128
8 hashing 75