Cod sursa(job #3128735)

Utilizator captn333Andreea Capitanu captn333 Data 10 mai 2023 17:52:49
Problema Sortare prin comparare Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.97 kb
#include <iostream>
#include <fstream>

using namespace std;

ifstream fin("algsort.in");
ofstream fout("algsort.out");

int n;
int v[500005];

void Citire();
void HeapSort();
void heapify(int n, int i);
void Afisare();

int main()
{
    Citire();
    HeapSort();
    Afisare();

    return 0;
}

void Citire()
{
    fin >> n;
    for(int i = 0; i < n; i++)
        fin >> v[i];
}

void HeapSort()
{
    int i;
    for(i = n / 2 - 1; i >= 0; i--)
        heapify(n, i);
    for(i = n - 1; i >= 0; i--)
    {
        swap(v[0], v[i]);
        heapify(i, 0);
    }
}

void heapify(int n, int i)
{
    int par = i;
    int st = 2 * i + 1;
    int dr = 2 * i + 2;
    if(st < n && v[st] > v[par])
        par = st;
    if(dr < n && v[dr] >  v[par])
        par = dr;
    if(par != i)
    {
        swap(v[i], v[par]);
        heapify(n, par);
    }
}

void Afisare()
{
    for(int i = 0; i < n; i++)
        fout << v[i] << " ";
}