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540E - Infinite Inversions (Codeforces - Codeforces Round #301 (Div. 2)) categories

Category Problems Count
1 implementation 1053
2 data structures 488
3 Codeforces Div. 2 - E Problems 437
4 Binary Search & Ternary Search 349
5 sortings 316
6 trees 201
7 Segment Tree 162
8 Binary Indexed Tree 69