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
Merge IntervalsGiven a collection of intervals, merge all overlapping intervals.For example,Given [1,3],[2,6],[8,10],[15,18],return [1,6],[8,10],[15,1...
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其他好文 时间：
2014-10-26 21:04:46
阅读次数：
199
【题目】
The string "PAYPALISHIRING" is written in a zigzag pattern on a given number of rows like
this: (you may want to display this pattern in a fixed font for better legibility)
P A H N
...
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其他好文 时间：
2014-10-26 16:57:47
阅读次数：
182
DP、KMP什么的都太高大上了，自己想了个朴素的遍历方法。
【题目】
Given a string S,
find the longest palindromic substring in S.
You may assume that the maximum length of S is
1000, and there exists one unique longest palin...
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其他好文 时间：
2014-10-26 15:37:32
阅读次数：
249
【题目】
You are given two linked lists representing two non-negative numbers. The digits are stored in reverse order and each of their nodes contain a single digit. Add the two numbers and return it...
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其他好文 时间：
2014-10-26 14:21:29
阅读次数：
243
【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
Longest Consecutive SequenceGiven an unsorted array of integers, find the length of the longest consecutive elements sequence.For example,Given [100, ...
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其他好文 时间：
2014-10-26 11:40:45
阅读次数：
111
Rotate ImageYou are given an n x n 2D matrix representing an image.Rotate the image by 90 degrees (clockwise).Follow up:Could you do this in-place?SOL...
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其他好文 时间：
2014-10-25 21:29:02
阅读次数：
317
【题目】
Suppose a sorted array is rotated at some pivot unknown to you beforehand.
(i.e., 0 1 2 4 5 6 7 might become 4
5 6 7 0 1 2).
You are given a target value to search. If found in the a...
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其他好文 时间：
2014-10-25 17:20:39
阅读次数：
225
Divide Two IntegersDivide two integers without using multiplication, division and mod operator.SOLUTION 11. 基本思想是不断地减掉除数，直到为0为止。但是这样会太慢。2. 我们可以使用2分法来加...
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其他好文 时间：
2014-10-24 22:02:06
阅读次数：
279
