Given a binary tree and a sum, determine if the tree has a root-to-leaf path such that adding up all the values along the path equals the given sum.
For example:
Given the below binary tree and sum
...
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其他好文 时间：
2014-08-29 22:42:32
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328
[ 问题: ]
Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid.
直译：给定一个字符串，该串包含字符'(', ')', '{', '}', '[', ']'， 请判断它是不是有效的
The brackets must close in the correct order, "()" and "()[]{}" are al...
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其他好文 时间：
2014-08-29 16:11:48
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195
LeetCode: Validata Binary Search TreeGiven a binary tree, determine if it is a valid binary search tree (BST).Assume a BST is defined as follows:The l...
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其他好文 时间：
2014-08-28 23:59:16
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421
Given a binary tree, determine if it is a valid binary search tree (BST).Assume a BST is defined as follows:The left subtree of a node contains only n...
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其他好文 时间：
2014-08-28 20:57:46
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201
Given a linked list, determine if it has a cycle in it.Follow up:Can you solve it without using extra space?/** * Definition for singly-linked list. *...
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其他好文 时间：
2014-08-28 19:41:25
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224
[ 问题: ]
Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases.
直译：给你一个字符串， 判定它是否是回文（只统计字母、数字，其他字符请忽略）。...
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其他好文 时间：
2014-08-28 09:45:09
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204
LeetCode: Balanced Binary TreeGiven a binary tree, determine if it is height-balanced.For this problem, a height-balanced binary tree is defined as a ...
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其他好文 时间：
2014-08-27 21:51:38
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199
Palindrome Number
Total Accepted: 19369 Total
Submissions: 66673My Submissions
Determine whether an integer is a palindrome. Do this without extra space.
判断一个数整数是不是回文？例如121,122...
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其他好文 时间：
2014-08-27 01:40:27
阅读次数：
180
LeetCode: Path SumGiven a binary tree and a sum, determine if the tree has a root-to-leaf path such that adding up all the values along the path equal...
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其他好文 时间：
2014-08-27 00:07:27
阅读次数：
298
Given a binary tree, determine if it is height-balanced.For this problem, a height-balanced binary tree is defined as a binary tree in which the depth...
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其他好文 时间：
2014-08-26 19:11:06
阅读次数：
193
