void divide(int a[], int n, int begin, int end, int k)
{
if (begin > end)
{
return;
}
int pivot = a[end];
int p = begin;
int q = begin-1;
while (p < end)
int find_sec_max(vector& data)
{
int cout = data.size();
int sec_max = -60000;
int max = data[0];
for (int i=1; imax) {
sec_max = max;
max = data[i];
}
else
{
if (data[i]>se
package com.ll.singlelogin;
import javax.servlet.http.*;
import java.util.*;
public class SingleLogin implements HttpSessionListener {
// 保存sessionID和username的映射
pri
