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2611 Removing Leaves data structures dfs and similar divide and conquer greedy implementation trees Statement F Codeforces Round 656 (Div. 3) {1385} PROGRAMMING Codeforces Round #656 (Div. 3) Editorial 2300
6506 Captain Flint and Treasure data structures dfs and similar dp graphs greedy implementation trees Statement D Codeforces Round 660 (Div. 2) {1388} PROGRAMMING 2000.0 Codeforces Round #660 Editorial 2000
2530 Cosmic Rays data structures dfs and similar greedy implementation trees Statement E EPIC Institute of Technology Round August 2024 (Div. 1 + Div. 2) {2002} PROGRAMMING 2000.0