Given a linked list, determine if it has a cycle in it.Follow up:Can you solve it without using extra space?分析：用map记录是否出现过。用时：60ms 1 /** 2 * Definiti....
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其他好文 时间：
2015-05-20 22:07:14
阅读次数：
145
题目：Follow up for "Remove Duplicates":What if duplicates are allowed at mosttwice?For example,Given sorted arraynums=[1,1,1,2,2,3],Your function should...
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编程语言 时间：
2015-05-17 21:40:55
阅读次数：
122
题目：Follow up for problem "Populating Next Right Pointers in Each Node".What if the given tree could be any binary tree? Would your previous solution s...
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其他好文 时间：
2015-05-15 13:21:07
阅读次数：
113
Given amxnmatrix, if an element is 0, set its entire row and column to 0. Do it in place.click to show follow up.Follow up:Did you use extra space?A s...
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其他好文 时间：
2015-05-14 23:19:26
阅读次数：
148
You 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?解题思路：找规律即可，JAVA...
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编程语言 时间：
2015-05-14 22:00:26
阅读次数：
106
You are given annxn2D matrix representing an image.Rotate the image by 90 degrees (clockwise).Follow up:Could you do this in-place?分析：先沿对角线进行对折，然后沿水平中...
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其他好文 时间：
2015-05-14 00:40:00
阅读次数：
164
Rotate ImageYou are given annxn2D matrix representing an image.Rotate the image by 90 degrees (clockwise).Follow up:Could you do this in-place?分析：rota...
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其他好文 时间：
2015-05-11 14:41:11
阅读次数：
121
Problem:
Given a linked list, determine if it has a cycle in it.
Follow up:
Can you solve it without using extra space?
https://oj.leetcode.com/problems/linked-list-cycle/
Problem II:
...
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其他好文 时间：
2015-05-10 15:44:57
阅读次数：
121
First集合的求法： First集合最终是对产生式右部的字符串而言的，但其关键是求出非终结符的First集合，由于终结符的First集合就是它自己，所以求出非终结符的First集合后，就可很直观地得到每个字符串的First集合。1. 直接收取：对形如U－a…的产生式（其中a是终结符），把a收入到F...
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其他好文 时间：
2015-05-09 16:21:38
阅读次数：
116
【题目】You are given annxn2D matrix representing an image.Rotate the image by 90 degrees (clockwise).Follow up:Could you do this in-place?【analyze】1.先对角线...
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其他好文 时间：
2015-05-06 17:06:14
阅读次数：
147
