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PreparedStatement获取自动生成键使用可以获取自动生成键方法Statement.RETURN_GENERATED_KEYS表示返回生成键PreparedStatementpstmt=conn.prepareStatement(sql,Statement.RETURN_GENERATED_KEYS);//获取生成键的结果集ResultSetrls=pstmt.getGeneratedKeys();getGeneratedKey..
Two elements of a binary search tree (BST) are swapped by mistake.
Recover the tree without changing its structure.
Note:
A solution using O(n)
space is pretty straight...
A - Colored Sticks
Time Limit:5000MS Memory Limit:128000KB 64bit IO Format:%I64d & %I64u
Submit Status
Description
You are given a bunch of wooden sticks. Each endpoint of each...
The Accomodation of Students
Time Limit: 5000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)
Total Submission(s): 2244 Accepted Submission(s): 1056
Problem Description
There a...
引入
在进行下一步的学习之前,我们需要厘清几个概念.
RAII
首先介绍一个编程习语,”RAII”(ResourceAcquisition Is Initialization,资源获取即为初始化),他描述了利用构造函数\析构函数,并在函数返回时自动析构的机制.简言之,RAII意为构造函数获取一种资源;打开一个文件,一个网络连接,或仅仅是从某I/O流中复制一些标志.这种获取是对象初始化的一部分...
B - Balance
Time Limit:1000MS Memory Limit:30000KB 64bit IO Format:%I64d
& %I64u
Submit Status
Description
Gigel has a strange "balance" and he wants to poise it. Actually, t...
//16进制颜色(html颜色值)字符串转为UIColor
+(UIColor *) hexStringToColor: (NSString *) stringToConvert
{
NSString *cString = [[stringToConvert stringByTrimmingCharactersInSet:[NSCharacterSet whites...
#include
#include
#include
using namespace std;
struct node{
int x , y ;
} p[2600];
int q[1200] ;
bool cmp(node a,node b)
{
return a.y < b.y || ( a.y == b.y && a.x < b.x ) ;
}
int main()
{...