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3383 Mike and Foam bitmasks combinatorics dp math number theory Statement C Codeforces Round 305 (Div. 1) {547} PROGRAMMING Codeforces Round #305 Editorial 2700
3771 Unusual Sequences bitmasks combinatorics dp math number theory Statement D Codeforces Round 450 (Div. 2) {900} PROGRAMMING Codeforces Round #450(Div. 2). Editorial. 2100
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
1037 Pave the Parallelepiped bitmasks brute force combinatorics math number theory Statement B Codeforces Round 497 (Div. 1) {1007} PROGRAMMING Editorial for Codeforces Round #497 by Skyglow 2400
2981 Make It One bitmasks combinatorics dp math number theory shortest paths Statement F Codeforces Round 519 by Botan Investments {1043} PROGRAMMING Codeforces Round #519 Editorial 2500
7334 Count GCD bitmasks combinatorics dp math number theory Statement D CodeTON Round 3 (Div. 1 + Div. 2, Rated, Prizes!) {1750} PROGRAMMING 1750.0 CodeTON Round 3 (Div. 1 + Div. 2) Editorial
12165 D-Function bitmasks combinatorics math number theory Statement G Codeforces Round 952 (Div. 4) {1985} PROGRAMMING Codeforces Round 952 (Div. 4) Editorial
8401 Goodbye, Banker Life bitmasks combinatorics constructive algorithms math number theory Statement F Codeforces Round 1006 (Div. 3) {2072} PROGRAMMING Codeforces Round 1006 (Div. 3) Editorial