I usually use tossy
as a my account ID.
- AtCoder
- Codeforces
- Aizu Online Judge
- TopCoder
- yukicoder
- CS Academy
- HackerRank
- CodeChef
- PKU Online Judge
For geometory, I mainly refer to http://dai1741.github.io/maximum-algo-2012/docs/geometry/ .
When you find some bug, feel free to contact me (or make an issue or a pull request)