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2171 Kuro and GCD and XOR and SUM binary search bitmasks brute force data structures dp dsu greedy math number theory strings trees Statement D Codeforces Round 482 (Div. 2) {979} PROGRAMMING 1750.0 Codeforces Round #482 (Div. 2) Editorial 2200
14730 Vampiric Powers, anyone? bitmasks brute force data structures dp greedy Statement C Codeforces Round 882 (Div. 2) {1847} PROGRAMMING 1500.0 Tutorial