Since 2016, I have been actively participating in competitive programming contests. Some of them are:
| Online judge | My account |
|---|---|
| CodeForces | https://codeforces.com/profile/pazabol |
| AtCoder | https://atcoder.jp/users/npnkhoi |
| CodeChef | https://www.codechef.com/users/npnkhoi |
| Hackerrank | https://www.hackerrank.com/npnkhoi |
| UVa | https://uhunt.onlinejudge.org/id/887021 |
My peak was in 2018-2019, when I got the Second Prize at Vietnam Olympiad in Informatics. Currently (2021), I am organizing a group of 20 students to practice for ICPC.