题目地址：https://leetcode-cn.com/probl…题目描述：给定一个二叉树和一个目标和，找到所有从根节点到叶子节点路径总和等于给定目标和的路径。 说明: 叶子节点是指没有子节点的节点。 示…

Description: There are two properties in the node student id and scores, to ensure that each student will have…

Shortest Word Distance Given a list of words and two words word1 and word2, return the shortest distance betwe…

Permutations I Given a collection of numbers, return all possible permutations. For example, [1,2,3] have the …

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题目描述 Say you have an array for which the ith element is the price of a given stock on day i. If you were only …

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