Cod sursa(job #1727914)

Utilizator jurjstyleJurj Andrei jurjstyle Data 11 iulie 2016 21:14:41
Problema Sortare prin comparare Scor 80
Compilator cpp Status done
Runda Arhiva educationala Marime 1.01 kb
#include <iostream>
#include <vector>
#include <algorithm>
#include <fstream>
#include <cstdlib>
#include <ctime>
using namespace std ;

ifstream f ("algsort.in") ;
ofstream g ("algsort.out") ;
int n , v[500005];

void QuickSort(int st, int dr)
{
    if(st < dr)
    {
        //determinam pivorul
        int m = st + rand () % ( dr - st + 1 ) ;
        int aux = v[st];
        v[st] = v[m];
        v[m] = aux;
        int i = st , j = dr, d = 0;
        while(i < j)
        {
            if(v[i] > v[j])
            {
                aux = v[i];
                v[i] = v[j];
                v[j] = aux;
                d = 1 - d;
            }
            i += d;
            j -= 1 - d;
        }
        QuickSort(st , i - 1);
        QuickSort(i + 1 , dr);
    }
}

int main()
{
    srand (time(NULL)) ;
    f >> n ;
    for(int i = 0 ; i < n ; i ++)
        f >> v[i];
    QuickSort(0 , n - 1);
    for(int i = 0 ; i < n ; i ++)
        g << v[i] << " ";
    return 0;
}