Cod sursa(job #275202)

Utilizator RobybrasovRobert Hangu Robybrasov Data 10 martie 2009 12:00:37
Problema Sortare prin comparare Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 0.65 kb
//Quicksort
#include <cstdio>
#define N 500001

int V[N];
int n,i,j;

int poz(int a, int b)
{
    int i,j,r=(a+b)>>1,t;
    t=V[a]; V[a]=V[r]; V[r]=t;
    for (i=0, j=-1; a<b; a+=i, b+=j)
        if (V[a]>V[b])
        {
            t=V[a]; V[a]=V[b]; V[b]=t;
            t=i; i=-j; j=-t;
        }

    return a;
}


void sort(int a, int b)
{
    if (a<b)
    {
        int m=poz(a,b);
        sort(a,m-1);
        sort(m+1,b);
    }
}

int main()
{
    freopen("data.in","r",stdin);
    freopen("data.out","w",stdout);
    scanf("%d\n",&n);
    for (i=1; i<=n; i++) scanf("%d",&V[i]);
    sort(1,n);

    for (i=1; i<=n; i++) printf("%d ",V[i]);

    return 0;
}