【题目】
Given a linked list and a value x, partition it such that all nodes less than x come before nodes greater than or equal to x.
You should preserve the original relative order of the nodes in each of the two partitions.
For example,
Given 1->4->3-...
分类:
其他好文 时间:
2014-06-03 00:02:29
阅读次数:
270
【题目】
Given a 2D binary matrix filled with 0's and 1's, find the largest rectangle containing all ones and return its area.
【题意】
给定一个由0和1填充的二维矩阵,找一个全是1的最大矩形
【思路】
扫描二维矩阵,凡是扫到值为1的块时候,以当前块为矩形的左上角区块拓展,找最大矩阵。
先找出以每个“1”区块为左上角区块的最大矩形,然后求出最大全局的最大矩...
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其他好文 时间:
2014-06-02 23:08:07
阅读次数:
289
题目:
给定一个字符串,返回该串没有重复字符的最长子串。
分析:
1)子串:子串要求是连续的。
2)无重复,出现重复就断了,必须从新的位置开始。而新的位置就是重复字符第一次出现位置的下一个位置。
3)整个串可能没有一处重复。
那么,为了找出当前访问的字符是否出现过,要怎么做呢?当然是hash,O(1)的时间,而且既然是字符, 定义个255的hash table 就可以了,has...
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其他好文 时间:
2014-06-01 10:48:31
阅读次数:
206
【题目】
Given n non-negative integers representing the histogram's bar height where the width of each bar is 1, find the area of largest rectangle in the histogram.
Above is a histogram where width of each bar is 1, given height = [2,1,5,6,2,3].
The...
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其他好文 时间:
2014-06-01 10:46:29
阅读次数:
242
【题目】
Given a string s1, we may represent it as a binary tree by partitioning it to two non-empty substrings recursively.
Below is one possible representation of s1 = "great":
great
/ gr eat
/ \ / g r e at
/ ...
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其他好文 时间:
2014-06-01 09:41:05
阅读次数:
196
【题目】
Given two sorted integer arrays A and B, merge B into A as one sorted array.
Note:
You may assume that A has enough space (size that is greater or equal to m + n) to hold additional elements from B. The number of elements initialized in A and B are...
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其他好文 时间:
2014-06-01 09:21:16
阅读次数:
292
【题目】
The gray code is a binary numeral system where two successive values differ in only one bit.
Given a non-negative integer n representing the total number of bits in the code, print the sequence of gray code. A gray code sequence must begin with 0.
...
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其他好文 时间:
2014-06-01 09:16:29
阅读次数:
242
【题目】
Given a collection of integers that might contain duplicates, S, return all possible subsets.
Note:
Elements in a subset must be in non-descending order.
The solution set must not contain duplicate subsets.
For example,
If S = [1,2,2], a solution ...
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其他好文 时间:
2014-06-01 08:51:06
阅读次数:
292
题目:
给定整数n,返回n对匹配的小括号字符串数组。
For example, given n = 3, a solution set is:
"((()))", "(()())", "(())()", "()(())", "()()()"
分析:
这种问题的模式是:1)问题的解有多个 ,2)每个解都是由多个有效的 ”步骤“ 组成的,3)变更以有解的某个或某些”步骤“ 可...
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其他好文 时间:
2014-05-31 22:28:45
阅读次数:
467