Cod sursa(job #1320505)

Utilizator YusukeFMI Mares Medar Razvan Yusuke Data 18 ianuarie 2015 00:41:48
Problema Sortare prin comparare Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 0.66 kb
#Mares Medar Razvan-Grupa 141
#Quicksort
#include<fstream>
using namespace std;
ifstream f("algsort.in");
ofstream g("algsort.out");
int i,n,a[500001],j;
void qsort(int st, int dr)
{
    int i,j,pivot,aux;
    if (st>dr) return ;
    i=st; j=dr; pivot=a[(i+j)/2];
    while(i<=j)
    {
        while(a[i]<pivot) i++;
        while(a[j]>pivot) j--;
        if (i<=j)
        {
            aux=a[i];a[i]=a[j];
            a[j]=aux;
            i++; j--;
        }
    }
    if (i<dr) qsort(i,dr);
    if (j>st) qsort(st,j);
}
int main()
{
    f>>n;
    for(i=1;i<=n;i++) f>>a[i];
    qsort(1,n);

    for(i=1;i<=n;i++)
        g<<a[i]<<" ";
}