题目:Given a linked list, determine if it has a cycle in it.Follow up:Can you solve it without using extra space?题解:这道题连带着II是很经典的,在看CC150时候,纠结这个问题纠结了很久....
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编程语言 时间:
2014-07-23 12:02:26
阅读次数:
311
Code the TreeTime Limit: 1000MSMemory Limit: 65536KTotal Submissions: 2259Accepted: 859DescriptionA tree (i.e. a connected graph without cycles) with ...
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其他好文 时间:
2014-07-22 23:07:52
阅读次数:
237
题目一:Longest Substring Without Repeating CharactersGiven a string, find the length of the longest substring without repeating characters. For example, ...
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其他好文 时间:
2014-07-22 23:04:12
阅读次数:
246
You want to use just the methods you like, without inheriting all the other methods that you’ll never need. This is possible with the borrowing method...
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编程语言 时间:
2014-07-22 22:41:33
阅读次数:
291
今天打开开发网站突然不能使用,发现时Mysql数据库down掉了,就去重启:
mysql.server restart
一直会报错:“Manager of pid-file quit without updating file”。
然后就去找原因,网上说有以下三个方面的问题:
1、硬盘不够用了,无法写入pid文件
2、进程卡死了,找到mysql进程kill掉,然后重启
3、目录权限...
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数据库 时间:
2014-07-22 17:53:52
阅读次数:
274
class ctypes.py_objectRepresents the C PyObject * datatype. Calling this without an argument creates a NULL PyObject * pointer.示例:>>> dc = {'a':'aaa',...
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编程语言 时间:
2014-07-22 00:28:38
阅读次数:
373
Reorder ListGiven a singly linked listL:L0→L1→…→Ln-1→Ln,reorder it to:L0→Ln→L1→Ln-1→L2→Ln-2→…You must do this in-place without altering the nodes' val...
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其他好文 时间:
2014-07-22 00:16:36
阅读次数:
230
Problem Description
In mathematics, a subsequence is a sequence that can be derived from another sequence by deleting some elements without changing the order of the remaining elements. For example, ...
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其他好文 时间:
2014-07-21 11:13:44
阅读次数:
270
Determine whether an integer is a palindrome. Do this without extra space.
判断一个int值是否为回文数。
本题有几点需要注意:
(1)不能用额外存储空间,也就是说只能用常数空间解决;诸如将int转换为string再去比较字符是不可行的;
(2)判断回文数的方法有两个:从中间开始向两头判断、从两头向中间判断;后者更简...
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其他好文 时间:
2014-07-19 23:22:39
阅读次数:
345
Linked List Cycle IIGiven a linked list, return the node where the cycle begins. If there is no cycle, returnnull.Follow up:Can you solve it without u...
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其他好文 时间:
2014-07-19 18:18:51
阅读次数:
270