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790 Castle dp greedy probabilities sortings trees Statement D Codeforces Beta Round 79 (Div. 1 Only) {101} PROGRAMMING Codeforces Beta Round 79, editoral 2300
1893 Alice's Adventures in the Rabbit Hole constructive algorithms dfs and similar dp greedy math probabilities trees Statement E Codeforces Round 986 (Div. 2) {2028} PROGRAMMING 2000.0 Codeforces Round 986 (Div. 2) Editorial
1096 Coloring a Red Black Tree dp greedy probabilities trees Statement C Codeforces Round 1093 (Div. 1) {2219} PROGRAMMING 1750.0