Cod sursa(job #2065394)

Utilizator IordachescuAncaFMI Iordachescu Anca Mihaela IordachescuAnca Data 13 noiembrie 2017 19:02:50
Problema Sortare prin comparare Scor 40
Compilator cpp Status done
Runda Arhiva educationala Marime 0.77 kb
#include<fstream>
using namespace std;
ifstream fin("algsort.in");
ofstream fout("algsort.out");
int sele(int a[],int p,int r)
{
    int i=p,j=r,di=1,dj=0;
    int aux;
    while(i<j)
    {
        if(a[i]>a[j])
        {
            aux=a[i];
            a[i]=a[j];
            a[j]=aux;
            di=1-di;
            dj=1-dj;
        }
        i=i+di;
        j=j-dj;
    }
    return i;
}
void qs(int a[],int p, int r)
{
    if(p<r)
    {
        int q=sele(a,p,r);
        qs(a,p,q-1);
        qs(a,q+1,r);
    }
}
int a[500002],n,i;
int main()
{
    fin>>n;
    for(i=1;i<=n;i++)
    {
        fin>>a[i];
    }
    qs(a,1,n);
    for(i=1;i<=n;i++)
    {
        fout<<a[i]<<" ";
    }
    fin.close();
    fout.close();
    return 0;
}