Cod sursa(job #1133181)

Utilizator cameleonGeorgescu Dan cameleon Data 4 martie 2014 16:15:34
Problema Sortare prin comparare Scor 60
Compilator cpp Status done
Runda Arhiva educationala Marime 0.68 kb
#include<cstdio>
#include<algorithm>
using namespace std;

int a[500005],n;
int pozitie(int p, int u)
{

     int pivot=a[(p+u)/2];

    while(p<u){
        while(a[p]<pivot) p++;
        while(a[u]>pivot) u--;
        swap(a[p],a[u]);
        if(a[p]==a[u] && a[p]==pivot) p++;
    }
    return u;
}
void quick(int p, int u)
{
    if(p<u){
        int poz=pozitie(p,u);
        quick(p,poz-1);
        quick(poz+1,u);
    }
}
int main()
{
    freopen("algsort.in","r",stdin);
    freopen("algsort.out","w",stdout);
   scanf("%d",&n);
    for(int i=1;i<=n;i++)scanf("%d",&a[i]);
    quick(1,n);
    for(int i=1;i<=n;i++) printf("%d ", a[i]);
    return 0;
}