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2474 Skills binary search brute force dp greedy sortings two pointers Statement B Codeforces Round 339 (Div. 1) {613} PROGRAMMING Tutorial 2200
8210 Office Keys binary search brute force dp greedy sortings Statement A Codeforces Round 424 (Div. 1, rated, based on VK Cup Finals) {830} PROGRAMMING Codeforces Round #424 Editorial 1900