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1736 Pairs of Pairs constructive algorithms dfs and similar graphs trees Statement E Codeforces Round 663 (Div. 2) {1391} PROGRAMMING 2750.0 Codeforces Round #663 (Div. 2) Editorial
10467 Link Cut Centroids constructive algorithms dfs and similar graphs trees Statement C Codeforces Round 670 (Div. 2) {1406} PROGRAMMING 1500.0 Codeforces Round #670 (Div. 2) Editorial
1850 Phoenix and Earthquake constructive algorithms dfs and similar ds graphs greedy trees Statement F Codeforces Global Round 14 {1515} PROGRAMMING 3250.0 Editorial
832 Off by One constructive algorithms dfs and similar geometry graphs sortings trees Statement E Educational Codeforces Round 108 (Rated for Div. 2) {1519} PROGRAMMING Educational Codeforces Round 108 Editorial
2005 Nastia Plays with a Tree constructive algorithms data structures dfs and similar dp flows graphs greedy implementation trees Statement D Codeforces Round 720 (Div. 2) {1521} PROGRAMMING 2250.0 90477
3520 Permutation Addicts constructive algorithms dfs and similar ds graphs trees Statement D Codeforces Global Round 22 {1738} PROGRAMMING 2000.0 Editorial of Codeforces Global Round <strong>22</strong>
889 XOR, Tree, and Queries constructive algorithms dfs and similar ds graphs trees Statement F Codeforces Round 851 (Div. 2) {1788} PROGRAMMING 3000.0 Codeforces Round #851 (Div. 2) Editorial
2989 Cool Graph constructive algorithms data structures dfs and similar ds graphs trees Statement D Refact.ai Match 1 (Codeforces Round 985) {2029} PROGRAMMING 2250.0