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587D - Duff in Mafia (Codeforces - Codeforces Round #326 (Div. 1) & Codeforces Round #326 (Div. 2)) categories

Category Problems Count
1 Binary Search & Ternary Search 352
2 Codeforces Div. 1, D 209
3 Codeforces Div. 2 - F Problems 119
4 2sat 21