Cod sursa(job #3124275)

Utilizator rapidu36Victor Manz rapidu36 Data 27 aprilie 2023 18:24:55
Problema Sortare prin comparare Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.96 kb
#include <fstream>

using namespace std;

const int N = 5e5;

int n, nh, h[N+1];

void coboara(int p)
{
    int fs = 2 * p, fd = 2 * p + 1, bun = p;
    if (fs <= nh && h[fs] > h[bun])
    {
        bun = fs;
    }
    if (fd <= nh && h[fd] > h[bun])
    {
        bun = fd;
    }
    if (bun != p)
    {
        swap(h[p], h[bun]);
        coboara(bun);
    }
}

int main()
{
    ifstream in("algsort.in");
    ofstream out("algsort.out");
    in >> n;
    for (int i = 1; i <= n; i++)
    {
        in >> h[i];
    }
    nh = n;
    ///transform h intr-un maxheap
    for (int i = n / 2; i >= 1; i--)
    {
        coboara(i);
    }
    ///mutam repetat maximul la final
    for (int i = n; i > 1; i--)
    {
        swap(h[1], h[i]);
        nh--;///am sters varful heap-ului
        coboara(1);
    }
    for (int i = 1; i <= n; i++)
    {
        out << h[i] << " ";
    }
    in.close();
    out.close();
    return 0;
}