https://blog.wongcw.com/2021/10/28/aoc-agon%e6%93%b4%e5%a4%a7%e9%81%8a%e6%88%b2%e5%a4%96%e8%a8%ad%e7%b5%84%e5%90%88%ef%bc%9a%e6%8e%a8%e5%87%bagm510-gm530%e6%bb%91%e9%bc%a0%e5%92%8cgh401%e8%80%b3%e6%a9%9f/