题目 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：
2015-02-09 12:54:42
阅读次数：
123
Given a string containing just the characters '(', ')', '{', '}', '[' and ']',
determine if the input string is valid.
The brackets must close in the correct order, "()" and "()[]{}" are
all va...
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其他好文 时间：
2015-02-08 12:55:47
阅读次数：
153
题目描述：Valid ParenthesesGiven a string containing just the characters'(',')','{','}','['and']', determine if the input string is valid.The brackets must...
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其他好文 时间：
2015-02-07 17:19:20
阅读次数：
217
题目 这道题是迄今为止最快通过的一道题，改了两次就过了，runtime一般（中等偏下，这点不太满意）。Palindrome就是判断一个整数是否对称。Determine whether an integer is a palindrome. Do this without extra space.click to show spoilers.Some hints:Could negativ...
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其他好文 时间：
2015-02-07 13:16:36
阅读次数：
141
Given three strings: s1, s2, s3, determine whether s3 is formed by the interleaving of s1 and s2.
Example
For s1 = "aabcc" s2 = "dbbca"
- When s3 = "aadbbcbcac", return true.
- When s3...
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其他好文 时间：
2015-02-06 16:55:45
阅读次数：
98
题目链接：Valid Sudoku
Determine if a Sudoku is valid, according to: Sudoku Puzzles - The Rules.
The Sudoku board could be partially filled, where empty cells are filled with the character '.'.
Note:
A...
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其他好文 时间：
2015-02-06 00:50:56
阅读次数：
189
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.Fo...
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其他好文 时间：
2015-02-05 23:15:41
阅读次数：
191
Given a string s and a dictionary of words dict, determine if s can be segmented into a space-separated sequence of one or more dictionary words.
For example, given
s = "leetcode",
dict = ["leet"...
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其他好文 时间：
2015-02-05 20:30:26
阅读次数：
273
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：
2015-02-05 16:29:09
阅读次数：
135
Compare two strings A and B, determine whether A contains all of the characters in B.The characters in string A and B are all Upper Case letters.Examp...
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其他好文 时间：
2015-02-05 07:03:49
阅读次数：
311
