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1.Unique Binary Search Trees 题目链接 题目要求： Givenn, how many structurally uniqueBST's(binary search trees) that store values 1...n? For example, Gi... 阅读全文
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之所以将这三道题放在一起，是因为这三道题非常类似。 1.Minimum Path Sum 题目链接 题目要求： Given amxngrid filled with non-negative numbers, find a path from top left to bottom rig... 阅读全文
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题目链接 题目要求： Find the total area covered by two rectilinear rectangles in a 2D plane. Each rectangle is defined by its bottom left corner and top r... 阅读全文