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3032 The LCMs Must be Large bitmasks brute force constructive algorithms math number theory Statement E Codeforces Round 561 (Div. 2) {1166} PROGRAMMING Codeforces Round #561 (Div. 2) Editorial 2000
3542 Decryption bitmasks constructive algorithms implementation math number theory Statement E Codeforces Round 671 (Div. 2) {1419} PROGRAMMING 2250.0 Codeforces Round #671 Editorial
1676 Xum bitmasks constructive algorithms math number theory Statement E Codeforces Global Round 11 {1427} PROGRAMMING 1500.0 Editorial of Global Round 11 2500
4738 GCD Guess bitmasks chinese remainder theorem constructive algorithms interactive math number theory Statement D Codeforces Round 781 (Div. 2) {1665} PROGRAMMING 1500.0 Codeforces Round #781 (Div. 2) Editorial
1202 Tree Weights bitmasks constructive algorithms data structures dfs and similar math matrices number theory trees Statement G Codeforces Round 884 (Div. 1 + Div. 2) {1844} PROGRAMMING 3500.0 Codeforces Round #884 (Div. 1 + Div. 2) Editorial
15452 Divisor Chain bitmasks constructive algorithms math number theory Statement C Harbour.Space Scholarship Contest 2023-2024 (Div. 1 + Div. 2) {1864} PROGRAMMING 1250.0 Harbour.Space Scholarship Contest 2023-2024 (Div. 1 + Div. 2) Editorial
7978 Prime XOR Coloring bitmasks constructive algorithms graphs greedy math number theory Statement D Pinely Round 4 (Div. 1 + Div. 2) {1991} PROGRAMMING 1500.0 Video Tutorial
8652 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
11723 Hacking Numbers (Easy Version) bitmasks constructive algorithms interactive math number theory Statement C1 Codeforces Round 1025 (Div. 2) {2109} PROGRAMMING 1250.0 Codeforces Round 1025 (Div. 2) Editorial
8422 XOR, Expression and Two Binary Numbers bitmasks constructive algorithms math number theory Statement D Codeforces Round 1102 (Div. 2) {2234} PROGRAMMING 1750.0