Cod sursa(job #1577787)

Utilizator dutzulBodnariuc Dan Alexandru dutzul Data 23 ianuarie 2016 20:36:23
Problema Sortare prin comparare Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 0.71 kb

#include<fstream>
#include<time.h>
#include <stdlib.h>
using namespace std;
fstream f("algsort.in",ios::in);
fstream g("algsort.out",ios::out);
int a[500003],n,k;

void quick(int li,int ls)
{
    int pivot,i=li,j=ls;
    pivot=a[i+rand()%(j-i+1)];

    while (i <= j)
    {
        while (a[i] < pivot && i < ls) i++;
        while (a[j] > pivot && j > li) j--;

        if (i <= j)
        {
            swap(a[i], a[j]);
            i++;
            j--;
        }
    }
    if (j > li) quick(li, j);
    if (i < ls) quick(i, ls);
}
int main()
{
    int i;
    f>>n;
    for(i=1; i<=n; i++) f>>a[i];
    srand(time(0));
    quick(1,n);
    for(i=1; i<=n; i++)g<<a[i]<<" ";
    g.close();
    f.close();
    return 0;
}