Cod sursa(job #1661902)

Utilizator alexzutu12Ichim Alexandru-Adrian alexzutu12 Data 24 martie 2016 11:52:16
Problema Sortare prin comparare Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 0.98 kb
#include<fstream>
using namespace std;
ifstream fin("algsort.in");
ofstream fout("algsort.out");
int a[500005],n;
void urcare(int p)
{
    int x;
    x=a[p];
    while((p>=2)&&(a[p/2]<x))
    {
        a[p]=a[p/2];
        p=p/2;
    }
    a[p]=x;
}
void coborare(int p,int n)
{
    int x,r;
    x=a[p];
    while(p*2<=n)
    {
        r=p*2;
        if((r+1<=n)&&(a[r+1]>a[r]))
        {
            r=r+1;
        }
        if(a[r]>x)
        {
            a[p]=a[r];
            p=r;
        }
        else
        {
            break;
        }
    }
    a[p]=x;
}
int main()
{
    int i,aux;
    fin>>n;
    for(i=1;i<=n;i++)
    {
        fin>>a[i];
    }
    for(i=2;i<=n;i++)
    {
        urcare(i);
    }
    for(i=n;i>=2;i--)
    {
        aux=a[i];
        a[i]=a[1];
        a[1]=aux;
        coborare(1,i-1);
    }
    for(i=1;i<=n;i++)
    {
        fout<<a[i]<<" ";
    }
    fout.close();
    fin.close();
    return 0;
}