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1662 Black and White Tree constructive algorithms dsu graphs greedy trees Statement D Codeforces Round 158 (Div. 2) {260} PROGRAMMING Codeforces Round #158 (Div. 2) Tutorial 2200
2068 Phoenix and Earthquake constructive algorithms dfs and similar dsu graphs greedy trees Statement F Codeforces Global Round 14 {1515} PROGRAMMING 3250.0 Editorial
15973 Mocha and Diana (Easy Version) brute force constructive algorithms dsu graphs greedy trees Statement D1 Codeforces Round 738 (Div. 2) {1559} PROGRAMMING 1500.0 Tutorial (en) 1400
3048 Mocha and Diana (Hard Version) brute force constructive algorithms dfs and similar dsu graphs greedy trees two pointers Statement D2 Codeforces Round 738 (Div. 2) {1559} PROGRAMMING 1500.0 Tutorial (en) 2500
1373 Connectivity Addicts constructive algorithms dsu graphs greedy interactive shortest paths sortings trees Statement F Codeforces Global Round 22 {1738} PROGRAMMING 2750.0 Editorial of Codeforces Global Round <strong>22</strong>
4041 Tree Orientation (Easy Version) constructive algorithms dfs and similar dsu graphs greedy trees Statement D1 Codeforces Round 1086 (Div. 2) {2208} PROGRAMMING 1250.0 Tutorial