Cod sursa(job #1008692)

Utilizator jul123Iulia Duta jul123 Data 11 octombrie 2013 17:22:44
Problema Sortare prin comparare Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 1.28 kb
#include<iostream>
#include<cstdlib>
#include<fstream>
#include<ctime>
using namespace std;
int v[500000],n;
void quicksort(int f[],int left, int right)
{
    int i=left, j=right, tmp, pivot,pivot1,pivot2,pivot3;
    pivot1=f[rand()%right+left];
    pivot2=f[rand()%right+left];
    srand(time(NULL));
    pivot3=f[rand()%right+left];
    srand(time(NULL));
    if((pivot1<=pivot2 && pivot2<=pivot3) || (pivot1>=pivot2 && pivot2 >= pivot3))
    pivot=pivot2;
    else
        if((pivot2<=pivot1 && pivot1<=pivot3) || (pivot2>=pivot1 && pivot1 >= pivot3))
            pivot=pivot1;
        else
            pivot=pivot3;
            pivot=f[(left+right)/2];
    while(i<=j)
    {
        while(f[i]<pivot)
            i++;
        while(f[j]>pivot)
            j--;
        if(i<=j)
        {
            tmp=f[i];
            f[i]=f[j];
            f[j]=tmp;
            i++;
            j--;
        }
    }
    if(left<j)
        quicksort(f,left,j);
    if(i<right)
        quicksort(f,i,right);

}
int main()
{
    ifstream f("quick.in");
    ofstream g("quick.out");
    int u;
    f>>n;
    for(u=1;u<=n;u++)
        f>>v[u];
    quicksort(v,1,n);
    for(u=1;u<=n;u++)
        g<<v[u]<<" ";
    f.close();
    g.close();
    return 0;
}