Cod sursa(job #1487936)

Utilizator andreiudilaUdila Andrei andreiudila Data 17 septembrie 2015 17:36:41
Problema Sortare prin comparare Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 0.6 kb
#include <fstream>
using namespace std;
ifstream fin("algsort.in");
ofstream fout("algsort.out");
int n,i,a[500005];
void qsort(int l, int r)
{
    int x=a[(l+r)/2];
    int i,j;
    i=l;
    j=r;
    do{
        while(a[i]<x)
        ++i;
        while(a[j]>x)
        --j;
        if(i<=j)
        {
            swap(a[i],a[j]);
            i++; j--;
        }

    }
    while(i<=j);
    if(j>l) qsort(l,j);
    if(i<r) qsort(i,r);
}
int main()
{
    fin>>n;
    for(i=1;i<=n;i++)
        fin>>a[i];
    qsort(1, n);
    for(i=1;i<=n;i++) fout<<a[i]<<" ";
    return 0;
}