典型的用栈（stack）结构解决问题的例子class Solution: def isPair(self,s1,s2): if (s1=='(' and s2==')')or (s2=='(' and s1==')'): return True ...
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其他好文 时间：
2014-10-27 14:17:47
阅读次数：
186
Valid Parentheses Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid.The brackets m...
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其他好文 时间：
2014-10-26 22:31:27
阅读次数：
438
Given a string S and a string T, find the minimum window in S which will contain all the characters in T in complexity O(n).
For example,
S = "ADOBECODEBANC"
T = "ABC"
Minimum window is "BAN...
Given an array of words and a length L, format the text such that each line has exactly L characters and is fully (left and right) justified.
You should pack your words in a greedy approach; that i...
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其他好文 时间：
2014-10-26 17:05:25
阅读次数：
175
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 val...
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其他好文 时间：
2014-10-26 17:02:49
阅读次数：
142
定义枚举：public static enum AppStateEnum { Valid("有效"), Virtual("虚拟"), Hide("隐藏"); public String toString() { return this.app...
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其他好文 时间：
2014-10-26 15:36:19
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131
Given a stringsconsists of upper/lower-case alphabets and empty space characters' ', return the length of last word in the string.If the last word doe...
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其他好文 时间：
2014-10-26 14:18:54
阅读次数：
158
Implement wildcard pattern matching with support for '?' and '*'.
'?' Matches any single character.
'*' Matches any sequence of characters (including the empty sequence).
The matching should cover t...
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其他好文 时间：
2014-10-26 13:08:38
阅读次数：
172
【题意】
Given a string, find the length of the longest substring without repeating characters. For example, the longest substring without
repeating letters for "abcabcbb" is "abc", which the length is...
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其他好文 时间：
2014-10-26 11:49:53
阅读次数：
203
Given a string containing just the characters '(' and ')',
find the length of the longest valid (well-formed) parentheses substring.
For "(()", the longest valid parentheses substring is "()",
...
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其他好文 时间：
2014-10-26 11:49:43
阅读次数：
185
