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...
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其他好文 时间:
2015-01-14 09:52:48
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161
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...
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移动开发 时间:
2015-01-14 00:58:06
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214
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..
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Web程序 时间:
2015-01-13 20:03:14
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132
Evaluate the value of an arithmetic expression inReverse Polish Notation.Valid operators are+,-,*,/. Each operand may be an integer or another express...
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其他好文 时间:
2015-01-11 17:35:26
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183
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...
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其他好文 时间:
2015-01-11 12:14:33
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119
The problem:Given a string containing only digits, restore it by returning all possible valid IP address combinations.For example:Given"25525511135",r...
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其他好文 时间:
2015-01-10 01:03:04
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318
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...
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其他好文 时间:
2015-01-09 12:00:02
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155
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...
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其他好文 时间:
2015-01-09 09:16:29
阅读次数:
149
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..
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其他好文 时间:
2015-01-09 01:52:51
阅读次数:
156
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...
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其他好文 时间:
2015-01-09 00:07:50
阅读次数:
208