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 n...
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其他好文 时间：
2015-04-22 23:34:04
阅读次数：
201
1.字符串值中包含E等科学计数法，比如12E-2，需要进行转化为普通数值0.12,
2.转化函数如下：
private Decimal ChangeDataToD(string strData)
{
Decimal dData = 0.0M;
if (strData.Contains("E"))
...
https://leetcode.com/problems/clone-graph/Clone an undirected graph. Each node in the graph contains alabeland a list of itsneighbors.OJ's undirected ...
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其他好文 时间：
2015-04-22 17:38:19
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117
1.将数组转化为列表将数组转化为一个列表时，程序员们经常这样做：1Listlist=Arrays.asList(arr);Arrays.asList()会返回一个ArrayList对象，ArrayList类是Arrays的一个私有静态类，而不是java.util.ArrayList类，java.util.Arrays.ArrayList类有set()、get()、contains()方法，..
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编程语言 时间：
2015-04-22 16:00:32
阅读次数：
139
思路是通过读取/proc/uptime获得系统启动时长。
使用命令cat /proc/uptime
通过man proc可以看到如下的信息：
/proc/uptime：This file contains two numbers: the uptime of the system (seconds), and the amount of time spent in idle process...
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编程语言 时间：
2015-04-22 00:42:24
阅读次数：
163
Problem DescriptionYour task is to calculate the sum of some integers. InputInput contains an integer N in the first line, and then N lines follow. Ea...
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其他好文 时间：
2015-04-20 20:46:06
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133
Problem DescriptionYour task is to Calculate a + b.InputInput contains an integer N in the first line, and then N lines follow. Each line consists of ...
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其他好文 时间：
2015-04-20 16:42:30
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101
The set [1,2,3,…,n] contains a total of n! unique permutations.By listing and labeling all of the permutations in order,We get the following sequence (ie, for n = 3):"123""132""213""231""312""321"Give...
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其他好文 时间：
2015-04-20 15:00:36
阅读次数：
116
Description: Suppose that a website contains two tables, the Customers table and the Orders table. Write a SQL query to find all customers who never ....
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其他好文 时间：
2015-04-19 22:33:39
阅读次数：
122
a is the array name.&a is the ponit of 2-D array which contains a[5].the type of &a should be int (*)[5]. oh what is int(*)5.............................
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其他好文 时间：
2015-04-19 17:52:04
阅读次数：
166
