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8099 Love Rescue dfs and similar dsu graphs greedy strings Statement D Codeforces Round 464 (Div. 2) {939} PROGRAMMING Analysis of Codeforces Round #464 1600
3013 Unstable String Sort data structures dfs and similar dsu graphs greedy implementation strings Statement F Codeforces Round 582 (Div. 3) {1213} PROGRAMMING Codeforces Round #582 (Div. 3) Editorial 2400
10906 Phase Shift dfs and similar dsu graphs greedy strings Statement C Codeforces Round 824 (Div. 2) {1735} PROGRAMMING 1250.0 Codeforces Round #824 — editorial