Commonly used algorithms competition, ACM, programming brush collection site title

1. The major sites large collection vjudge  https://vjudge.net/

2. North openjudge one hundred practicing  http://bailian.openjudge.cn/

3. Garlic meter off   https://www.jisuanke.com/

4. Luo Gu  https://www.luogu.com.cn/training/mainpage

Leedcode 5.  https://leetcode-cn.com/  (Chinese website)

6. Zhejiang University PAT  https://www.patest.cn/    and ZOJ  https://zoj.pintia.cn/

7. Hokkaido University POJ  Http://Poj.Org/

8. Hangzhou Electronic Technology big HDU  http://acm.hdu.edu.cn/

9. Codeforces http://codeforces.com/

10. cattle off network  https://www.nowcoder.com/

Others can be found on the vjudge