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4517 Minimal Segment Cover data structures dfs and similar divide and conquer dp greedy implementation trees Statement E Educational Codeforces Round 66 (Rated for Div. 2) {1175} PROGRAMMING Editorial 2200
2813 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
21625 Permutation Transformation dfs and similar divide and conquer implementation Statement D Codeforces Round 702 (Div. 3) {1490} PROGRAMMING Codeforces Round #702 (Div. 3) Editorial
504 Air Reform data structures dfs and similar divide and conquer dsu graphs implementation trees Statement E Codeforces Round 775 (Div. 1, based on Moscow Open Olympiad in Informatics) {1648} PROGRAMMING 2500.0 Codeforces Round #775 Editorial
2105 Omsk Metro (hard version) data structures dfs and similar divide and conquer dp implementation math trees Statement F2 Codeforces Round 881 (Div. 3) {1843} PROGRAMMING Codeforces Round #881 (Div. 3) Editorial
397 Bermart Ice Cream data structures dfs and similar divide and conquer dp implementation trees Statement F Educational Codeforces Round 171 (Rated for Div. 2) {2026} PROGRAMMING Educational Codeforces Round 171 Editorial
604 Baudelaire (hard version) binary search dfs and similar divide and conquer implementation interactive trees Statement G2 Codeforces Round 1020 (Div. 3) {2106} PROGRAMMING Codeforces Round 1020 (Div. 3) Editorial