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252 Iqea data structures dfs and similar divide and conquer dsu shortest paths trees Statement E Codeforces Round 467 (Div. 1) {936} PROGRAMMING Codeforces Round #467, Editorial 3300
1362 Koala and Notebook data structures dfs and similar graphs shortest paths strings trees Statement F Codeforces Round 584 - Dasha Code Championship - Elimination Round (rated, open for everyone, Div. 1 + Div. 2) {1209} PROGRAMMING 69791 2600
5864 1-Trees and Queries data structures dfs and similar shortest paths trees Statement E Codeforces Round 620 (Div. 2) {1304} PROGRAMMING 2000.0 Codeforces Round #620 (Div. 2) Editorial 2000
3999 Unusual Entertainment data structures dfs and similar dsu shortest paths sortings trees Statement G Codeforces Round 909 (Div. 3) {1899} PROGRAMMING Разбор Codeforces Round 909 (Div. 3)