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2172 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
7041 Infinite Set dp math matrices number theory strings Statement D Codeforces Round 772 (Div. 2) {1635} PROGRAMMING 2250.0 Codeforces Round #772 Editorial
419 Bosco and Particle dp math number theory strings Statement E Codeforces Round 865 (Div. 1) {1815} PROGRAMMING 3000.0 Editorial of Codeforces Round #865 3100