Cod sursa(job #847986)

Utilizator mcip1977Muresan Ciprian mcip1977 Data 4 ianuarie 2013 18:17:50
Problema Sortare prin comparare Scor 40
Compilator cpp Status done
Runda Arhiva educationala Marime 0.81 kb
#include <fstream>
using namespace std;
ifstream fin("algsort.in");
ofstream fout("algsort.out");

int poz(int a[500001], int s, int d)
{
   int i,j,di,dj,aux;
   i=s; j=d; di=0; dj=1;
   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 j;
}

void QS(int a[500001], int s, int d)
{
    int p;
    if(s<d)
    {
        p=poz(a,s,d);
        QS(a,s,p-1);
        QS(a,p+1,d);
    }
}

void citire(int a[500001], int &n)
{
    int i;
    fin>>n;
    for(i=1;i<=n;i++) fin>>a[i];
}

void afis(int a[500001], int n)
{
    int i;
    for(i=1;i<=n;i++) fout<<a[i]<<" ";
}

int main()
{
    int a[500001], n;
    citire(a,n);
    QS(a,1,n);
    afis(a,n);
    return 0;
}