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2077 Dog Snacks binary search dfs and similar dp greedy trees Statement E Codeforces Round 688 (Div. 2) {1453} PROGRAMMING 2500.0 Codeforces Round #688 (Div. 2) Editorial
13133 Maximize the Root binary search dfs and similar dp greedy trees Statement D Educational Codeforces Round 168 (Rated for Div. 2) {1997} PROGRAMMING Video Tutorial
353 Vertex Pairs binary search brute force dfs and similar dp greedy trees Statement E Educational Codeforces Round 172 (Rated for Div. 2) {2042} PROGRAMMING