中文 写得非常好 dp
https://leetcode-cn.com/problems/the-earliest-and-latest-rounds-where-players-compete/solution/dong-tai-gui-hua-fen-lei-tao-lun-zhuan-y-9pjd/
https://leetcode-cn.com/problems/the-earliest-and-latest-rounds-where-players-compete/solution/dong-tai-gui-hua-fen-lei-tao-lun-zhuan-y-9pjd/
[]