mzrong:
博客地址：https://www.cnblogs.com/mzrong/
Codeforces 631 D. Dreamoon Likes Sequences 位运算^ 组合数 递推 Codeforces 631 (Div. 2) E. Drazil Likes Heap 贪心 Codeforces Round #636 (Div. 3) E. Weights Distributing 贪心+图 Codeforces Round #637 (Div. 2) C. Nastya and Strange Generator 思维（题意杀
Codeforces 631 D. Dreamoon Likes Sequences 位运算^ 组合数 递推
Codeforces 631 (Div. 2) E. Drazil Likes Heap 贪心
Codeforces Round #636 (Div. 3) E. Weights Distributing 贪心+图
Codeforces Round #637 (Div. 2) C. Nastya and Strange Generator 思维（题意杀