0x3f:https://www.bilibili.com/video/BV1Gs4y1E7EU/

chenf99:由易到难,一步步说明思路和细节:https://leetcode.cn/problems/minimum-cost-to-merge-stones/solution/yi-dong-you-yi-dao-nan-yi-bu-bu-shuo-ming-si-lu-he/

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