题目链接：Valid Parentheses
Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid.
The brackets must close in the correct order, "()" and "...
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其他好文 时间：
2015-01-30 22:40:16
阅读次数：
227
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 of the two subtrees of every node never diffe...
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其他好文 时间：
2015-01-30 16:08:22
阅读次数：
149
Description描述There is sequence 1, 12, 123, 1234, ..., 12345678910, ... . Given first N elements of that sequence. You must determine amount of numbers...
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其他好文 时间：
2015-01-29 22:23:58
阅读次数：
258
Total Accepted: 24574
Total Submissions: 90344
Determine if a Sudoku is valid, according to:
Sudoku Puzzles - The Rules.
The Sudoku board could be partially filled, where empty cells ...
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其他好文 时间：
2015-01-29 14:44:06
阅读次数：
182
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：
2015-01-29 12:07:35
阅读次数：
117
Given a stringsand a dictionary of wordsdict, determine ifscan be segmented into a space-separated sequence of one or more dictionary words.For exampl...
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其他好文 时间：
2015-01-29 07:02:47
阅读次数：
150
题目链接：Palindrome Number
Determine whether an integer is a palindrome. Do this without extra space.
Some hints:
Could negative integers be palindromes? (ie, -1)
If you are thinking of converting the...
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其他好文 时间：
2015-01-28 21:30:17
阅读次数：
208
/* * 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 th.....
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其他好文 时间：
2015-01-27 23:16:02
阅读次数：
206
/* 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...
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其他好文 时间：
2015-01-27 23:09:49
阅读次数：
206
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 of the two subtrees of every node never diffe...
分类：
其他好文 时间：
2015-01-27 18:29:32
阅读次数：
168
