My code practices in many online judge websites. You can find me by searching handle "txingml".
- UVa https://uva.onlinejudge.org/
- atcoder https://atcoder.jp/
- codeforces http://codeforces.com/
- codejam https://code.google.com/codejam/
- csa https://csacademy.com/
- hdu http://acm.hdu.edu.cn/
- hiho https://hihocoder.com/
- nowcoder https://www.nowcoder.com/acm/contest/vip-contest-index#list
- poj http://poj.org/
- topcoder https://arena.topcoder.com/