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528 Around the World bitmasks combinatorics dfs and similar dp graphs graphs math trees Statement D Codeforces Round 618 (Div. 1) {1299} PROGRAMMING 1750.0 Codeforces Round #618 Editorial 2900
9105 Bakry and Partitioning bitmasks constructive algorithms dfs and similar dp graphs trees Statement C Codeforces Round 746 (Div. 2) {1592} PROGRAMMING 1500.0 95583
538 Min-Fund Prison (Hard) bitmasks dfs and similar dp graphs trees Statement G3 Helvetic Coding Contest 2024 online mirror (teams allowed, unrated) {1970} PROGRAMMING Helvetic Coding Contest 2024 Editorial 2400