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111. Minimum Depth of Binary Tree 问题描述： Given a binary tree, find its minimum depth. The minimum depth is the number of nodes along the shortest path 阅读全文
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题目： Given an array of strings, group anagrams together. （给定一个字符串数组，将他们根据anagram归类） 样例： given: ["eat", "tea", "tan", "ate", "nat", "bat"], Return: [["a 阅读全文