P1177 【模板】快速排序

// Problem: P1177 【模板】快速排序
// Contest: Luogu
// URL: https://www.luogu.com.cn/problem/P1177
// Memory Limit: 125 MB
// Time Limit: 3000 ms
// User: Pannnn
 
#include <bits/stdc++.h>
 
using namespace std;
 
void quickSort(vector<int> &info, int l, int r) {
    if (l >= r) {
        return;
    }
    int i = l - 1, j = r + 1;
    int x = info[(l + r) >> 1];
    while (i < j) {
        while (info[++i] < x);
        while (info[--j] > x);
        if (i < j) {
            swap(info[i], info[j]);
        }
    }
    quickSort(info, l, j);
    quickSort(info, j + 1, r);
}
 
int main() {
    int n;
    cin >> n;
    vector<int> info(n);
    for (int i = 0; i < n; ++i) {
        cin >> info[i];
    }
    
    quickSort(info, 0, n - 1);
    for (int i = 0; i < n; ++i) {
        cout << info[i] << " ";
    }
    cout << endl;
    return 0;
}