Given a linked list, return the node where the cycle begins. If there is no cycle, return null.Follow up:
Can you solve it without using extra space?解题思路设链表长度为n，头结点与循环节点之间的长度为k。定义两个指针slow和fast，slow每次走...
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其他好文 时间：
2015-03-18 14:07:38
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116
Given a linked list, determine if it has a cycle in it.Follow up:Can you solve it without using extra space?runner 问题，注意while循环的条件。 1 /** 2 * Definit....
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2015-03-18 06:27:32
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114
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：
2015-03-16 14:26:38
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105
Given a linked list, return the node where the cycle begins. If there is no cycle, returnnull.Follow up:Can you solve it without using extra space?思路：...
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其他好文 时间：
2015-03-16 12:38:20
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95
题目链接：Unique Paths II
Follow up for "Unique Paths":
Now consider if some obstacles are added to the grids. How many unique paths would there be?
An obstacle and empty space is marked as 1 and 0 resp...
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其他好文 时间：
2015-03-15 23:43:50
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310
Given a linked list, determine if it has a cycle in it.Follow up:Can you solve it without using extra space?思路：1.两个指针，一个走1步，一个走2步，如果相遇则有环注意： 在使用p->nex...
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其他好文 时间：
2015-03-15 19:38:56
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126
标题：Populating Next Right Pointers in Each Node II通过率：31.7%难度：难Follow up for problem "Populating Next Right Pointers in Each Node".What if the given tr...
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2015-03-13 14:00:13
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153
Unique Paths II问题：Follow up for "Unique Paths":Now consider if some obstacles are added to the grids. How many unique paths would there be?An obstacle...
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其他好文 时间：
2015-03-12 18:47:56
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181
本文是在学习中的总结，欢迎转载但请注明出处：http://blog.csdn.net/pistolove/article/details/44216867
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?
思路：
（1）题意为给定一个n*...
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其他好文 时间：
2015-03-12 09:54:15
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105
Linked List Cycle ii Given a linked list, return the node where the cycle begins. If there is no cycle, return null. Follow up: Can you solve it ...
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其他好文 时间：
2015-03-12 00:39:43
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157
