csxaxx:
博客地址：https://www.cnblogs.com/csxaxx/
Codeforces Round #570 (Div. 3) B. Equalize Prices Codeforces Round #556 (Div. 2) C. Prefix Sum Primes
Codeforces Round #570 (Div. 3) B. Equalize Prices
Codeforces Round #556 (Div. 2) C. Prefix Sum Primes