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459D - Pashmak and Parmida's problem (Codeforces - Codeforces Round #261 (Div. 2)) categories

Category Problems Count
1 data structures 489
2 Codeforces Div. 2 - D Problems 443
3 sortings 316
4 Segment Tree 162
5 Binary Indexed Tree 69
6 divide and conquer 66