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752 Forced Online Queries Problem data structures divide and conquer dsu graphs trees Statement F Educational Codeforces Round 72 (рейтинговый для Див. 2) {1217} PROGRAMMING Educational Codeforces Round 72 Editorial 2800
973 Jumping Around data structures divide and conquer dp dsu graphs shortest paths trees Statement F Educational Codeforces Round 111 (рейтинговый для Див. 2) {1550} PROGRAMMING Educational Codeforces Round 111 Editorial
623 Air Reform data structures dfs and similar divide and conquer dsu graphs implementation trees Statement E Codeforces Round 775 (Div. 1, по задачам Открытой олимпиады школьников по программированию) {1648} PROGRAMMING 2500.0 Codeforces Round #775 Editorial
44 Burenka and Pether *special data structures dfs and similar divide and conquer dsu graphs sortings trees Statement C XVIII Открытая олимпиада по программированию - заключительный этап, день 2 (вне рейтинга, зеркало, правила IOI) {1940} PROGRAMMING