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255D - Mr. Bender and Square (Codeforces - Codeforces Round #156 (Div. 2) & Codeforces Round #156 (Div. 1)) categories

Category Problems Count
1 implementation 1055
2 math 684
3 brute force 494
4 Codeforces Div. 2 - D Problems 443
5 Binary Search & Ternary Search 352