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1980 List Of Integers binary search bitmasks brute force combinatorics math number theory Statement G Educational Codeforces Round 37 (Rated for Div. 2) {920} PROGRAMMING T 2300
1341 Classical? binary search combinatorics number theory Statement F Codeforces Round 613 (Div. 2) {1285} PROGRAMMING Codeforces Round #613 (Div. 2) Editorial 2800
2457 LCM Sum (easy version) binary search brute force combinatorics math number theory two pointers Statement E1 Codeforces Round 813 (Div. 2) {1712} PROGRAMMING 2000.0 Codeforces Round #813 (Div. 2) Editorial
22139 Earning on Bets binary search combinatorics constructive algorithms number theory Statement C Codeforces Round 951 (Div. 2) {1979} PROGRAMMING 1500.0 Codeforces Round 951 (Div. 2) Editorial
1906 Little String (Hard Version) binary search combinatorics dp greedy math number theory Statement D2 Codeforces Round 1075 (Div. 2) {2189} PROGRAMMING 750.0 Codeforces Round 1075 (Div. 2) Editorial