划分型dp

参考下面题单里面

五、划分型 DP
https://leetcode.cn/discuss/post/3581838/fen-xiang-gun-ti-dan-dong-tai-gui-hua-ru-007o/

https://leetcode.cn/problems/partition-array-to-minimize-xor/description/
视频：17:37 Q3 划分型 DP
https://www.bilibili.com/video/BV1j6gZzqEdc