[LeetCode] Sum of Left Leaves 左子叶之和
Find the sum of all left leaves in a given binary tree. Example: 这道题让我们求一棵二叉树的所有左子叶的和，那么看到这道题我们知道这肯定是考二叉树的遍历问题，那么最简洁的写法肯定是用递归，由于我们只需要累加左子叶 ...
原文：[LeetCode] Map Sum Pairs 映射配对之和
Implement a MapSum class withinsert, andsummethods. For the methodinsert, you ll be given a pair of string, integer . The string represents the key and the integer represents the value. If the key al ...
2017-09-30 23:54 3 2781 推荐指数：
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