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Codeforces Round #508 (Div. 2) A. Equality：Codeforces 1038A. Equality(水题)
Codeforces Round #508 (Div. 2) B. Non-Coprime Partition：Codeforces 1038B. Non-Coprime Partition(暴力)
Codeforces Round #508 (Div. 2) C. Gambling： Codeforces 1038C. Gambling(贪心)
Codeforces Round #508 (Div. 2) D. Slime： Codeforces 1038D. Slime(思维)