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

Category Problems Count
1 implementation 1055
2 data structures 496
3 Codeforces Div. 2 - E Problems 439
4 Binary Search & Ternary Search 352
5 sortings 317
6 trees 202
7 Segment Tree 162
8 Binary Indexed Tree 69