Cod sursa(job #1868727)

Utilizator silviuilasSilviu Ilas silviuilas Data 5 februarie 2017 12:03:22
Problema Sortare prin comparare Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 0.71 kb
#include <bits/stdc++.h>

using namespace std;
ifstream f("algsort.in");
ofstream g("algsort.out");
int n,v[500010];
void heap_down(int,int);
int main()
{
    f>>n;
    srand(time(0));
    for(int i=1;i<=n;i++)
        f>>v[i];
    for(int i=n/2;i>=1;i--)
        heap_down(i,n);
    for(int i=n;i>=1;i--)
    {
        swap(v[1],v[i]);
        heap_down(1,i-1);
    }


    for(int i=1;i<=n;i++)
        g<<v[i]<<' ';
    return 0;
}
void heap_down(int tata,int lheap)
{
    int fiu=2*tata;
    if(fiu>lheap)
        return;
    if(fiu<lheap)
        if(v[fiu]<v[fiu+1])
            fiu++;
    if(v[fiu]>v[tata])
    {
        swap(v[fiu],v[tata]);
        heap_down(fiu,lheap);
    }
}