Cod sursa(job #1814875)

Utilizator d0rina2011Craciun Dorina d0rina2011 Data 24 noiembrie 2016 17:21:16
Problema Sortare prin comparare Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 0.77 kb
#include <iostream>
#include <fstream>
#include <stdlib.h>
#include <algorithm>

using namespace std;

ifstream fin("algsort.in");
ofstream fout("algsort.out");

int n, v[500001];

void quick_sort(int st, int dr){
    int i = st, j = dr;
    int pivot = rand() % n + 1;
    do{
        while(v[i] <= pivot && i <= dr){
            i++;
        }
        while(v[j] > pivot && j >= st){
            j--;
        }
        swap(v[i], v[j]);
        i++;
        j--;
    }while(i <= j);
    if(st < j) quick_sort(st, j);
    if(dr > i) quick_sort(i, dr);
}
int main()
{
    int i;
    fin>>n;
    for(i = 1; i <= n; ++i){
        fin>>v[i];
    }
    quick_sort(1, n);
    for(i = 1; i <= n; ++i){
        fout<<v[i]<<" ";
    }
    return 0;
}