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531 Half-decay tree data structures divide and conquer dp math probabilities Statement D Codeforces Beta Round 62 {68} PROGRAMMING 2400
893 Battalion Strength data structures divide and conquer probabilities Statement F CodeCraft-20 (Div. 2) {1316} PROGRAMMING 2500.0 Codecraft-20 (Div.2) Editorial 2800
660 Frequency Mismatch (Easy Version) binary search data structures divide and conquer hashing probabilities trees Statement F1 Codeforces Round 940 (Div. 2) and CodeCraft-23 {1957} PROGRAMMING 2250.0 Codeforces Round #940 and CodeCraft-23 (Div. 2) Editorial 2600
2635 Buratsuta 3 binary search brute force data structures divide and conquer probabilities Statement G Codeforces Round 1054 (Div. 3) {2149} PROGRAMMING __rose