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359D - Pair of Numbers (Codeforces - Codeforces Round #209 (Div. 2)) categories

Category Problems Count
1 math 684
2 data structures 496
3 brute force 494
4 Codeforces Div. 2 - D Problems 443
5 Binary Search & Ternary Search 352
6 two pointers 128
7 Sparse Table 1