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LeetCode--Validate Binary Search Tree
Given a binary tree, determine if it is a valid binary search tree (BST). Assume a BST is defined as follows: The left subtree of a node contains only nodes with keys less than the node's key.Th...
分类:其他好文   时间:2015-01-14 09:52:48    阅读次数:161
Mac OS下Android Studio的Java not found unable to find a valid jvm
Android Studio正式版已经发布一段时间了,使用Mac版的Android Studio可能与遇到Java not found:Android Studio was unable to find a valid JVM问题。 解决这个问题: 首先要确定mac系统上有没有安装jdk,并查看自己的jdk版本,可以在终端上输入命令 java -version查...
分类:移动开发   时间:2015-01-14 00:58:06    阅读次数:214
linux /usr/local/apache/bin/apxs 路径是在的,为什么会提示You must specify a valid --with-apxs path
linux下编译捍Youmustspecifyavalid--with-apxspath原因是:在没有安装prel就先安装apache造成的解决方法:[root@apachebin]#vi/usr/local/apache/bin/apxs修改下面的第一行#!/usr/bin/perl-w##LicensedtotheApacheSoftwareFoundation(ASF)underoneormore#contributorlicenseag..
分类:Web程序   时间:2015-01-13 20:03:14    阅读次数:132
leetcode 150. Evaluate Reverse Polish Notation
Evaluate the value of an arithmetic expression inReverse Polish Notation.Valid operators are+,-,*,/. Each operand may be an integer or another express...
分类:其他好文   时间:2015-01-11 17:35:26    阅读次数:183
Longest Valid Parentheses
难点1,是栈,2是流程class Solution {public: int longestValidParentheses(string s) { stack mstack; char cbefore; int count = 0; if(s.empt...
分类:其他好文   时间:2015-01-11 12:14:33    阅读次数:119
[LeetCode#93]Restore IP Addresses
The problem:Given a string containing only digits, restore it by returning all possible valid IP address combinations.For example:Given"25525511135",r...
分类:其他好文   时间:2015-01-10 01:03:04    阅读次数:318
【leetcode系列】Valid Parentheses
非常经典的问题,使用栈来解决,我这里自己实现了一个栈,当然也能够直接用java自带的Stack类。自己实现的栈代码:import java.util.LinkedList;class StackOne { LinkedList data; int top; int maxSize; StackOne...
分类:其他好文   时间:2015-01-09 12:00:02    阅读次数:155
LeetCiode--Valid Parentheses
Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. The brackets must close in the correct order, "()" and "()[]{}" are all va...
分类:其他好文   时间:2015-01-09 09:16:29    阅读次数:149
django 学习个人总结 之form表单提交
fromdjango.shortcutsimportrender_to_response fromdjangoimportforms fromdjango.httpimportHttpResponse classUserForm(forms.Form): name=forms.CharField() defregister(req): ifreq.method==‘POST‘: form_object=UserForm(req.POST) ifform_object.is_valid(): printfo..
分类:其他好文   时间:2015-01-09 01:52:51    阅读次数:156
[LeetCode#98]Validate Binary Search Tree
The problem:Given a binary tree, determine if it is a valid binary search tree (BST).Assume a BST is defined as follows:The left subtree of a node con...
分类:其他好文   时间:2015-01-09 00:07:50    阅读次数:208
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