#25829: 我這裡有解釋它 DP 優化的思路，如何達到 n * log n
allllllan123456
(God of Computer Science)
https://alan23273850.github.io/Online-Judge-Problems/algorithms/%E5%BA%8F%E5%88%97/2.-%E6%9C%80%E9%95%B7%E9%81%9E%E5%A2%9E%E5%AD%90%E5%BA%8F%E5%88%97/