Cod sursa(job #927864)

Utilizator rokkyo13Andrei Ciupitu rokkyo13 Data 26 martie 2013 09:01:04
Problema Sortare prin comparare Scor 40
Compilator cpp Status done
Runda Arhiva educationala Marime 1.03 kb
#include <fstream>
using namespace std;

ifstream fin("algsort.in");
ofstream fout("algsort.out");

void quicksort(int *a,int inf, int sup);
int a[500000];

int main()
{
    int n;
    fin>>n;
    for (int i = 0; i<= n-1; i++)
        fin>>a[i];
    quicksort(a,0,n-1);
    for(int i = 0; i<=n-1;i++)
        fout<<a[i]<<" ";
    return 0;
}

void quicksort(int *a, int inf, int sup)
{
    if (inf<sup)
    {
        int pivot = a[inf];
        int aux;
        int i = inf+1;
        int j = sup;
        while (i<=j)
        {
            while((i<=sup) && (a[i] <=pivot))
                i++;
            while((j>=inf) && (a[j]>pivot))
                j--;
            if ((i<j) && (i<=sup) && (j>=inf))
            {
                aux = a[i];
                a[i] = a[j];
                a[j] = aux;
                i++;
                j--;
            }
        }
        i--;
        a[inf] = a[i];
        a[i] = pivot;
        quicksort(a,inf,i-1);
        quicksort(a,i+1,sup);
    }
}