leetCode 312

https://leetcode.com/problems/burst-balloons/ https://leetcode.com/problems/burst-balloons/discuss/76245/Easiest-Java-Solution 解題思路：這道題解題方法很巧，突破點爲最終留下的數，他的左邊是  start -1  右邊是 end+1 , i兩邊疊加的值分別是 start -

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