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680 Vus the Cossack and a Field divide and conquer implementation math Statement E Codeforces Round 571 (Div. 2) {1186} PROGRAMMING E 2500
3436 Perfect Triples bitmasks brute force constructive algorithms divide and conquer greedy implementation math Statement C Codeforces Round 633 (Div. 1) {1338} PROGRAMMING 1500.0 Editorial
4405 Guess The Maximums binary search divide and conquer implementation interactive math Statement D Codeforces Round 646 (Div. 2) {1363} PROGRAMMING 2000.0 78202 2100
10169 Divide and Summarize binary search brute force data structures divide and conquer implementation sortings Statement D Codeforces Round 689 (Div. 2, based on Zed Code Competition) {1461} PROGRAMMING 1500.0 Codeforces Round #689 (Div. 2). Editorial
2105 Omsk Metro (hard version) data structures dfs and similar divide and conquer dp implementation math trees Statement F2 Codeforces Round 881 (Div. 3) {1843} PROGRAMMING Codeforces Round #881 (Div. 3) Editorial
2462 Counting Necessary Nodes bitmasks divide and conquer implementation math Statement F Codeforces Round 1009 (Div. 3) {2074} PROGRAMMING Codeforces Round 1009 (Div. 3) — Editorial
2251 Removal of a Sequence (Hard Version) binary search constructive algorithms divide and conquer greedy implementation math number theory probabilities Statement D2 Educational Codeforces Round 184 (Rated for Div. 2) {2169} PROGRAMMING Educational Codeforces Round 184 Editorial