Cod sursa(job #3124279)

Utilizator SergetecLefter Sergiu Sergetec Data 27 aprilie 2023 18:57:00
Problema Sortare prin comparare Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.96 kb
/*
 * Lefter Sergiu - 27/04/2023
*/
#include <fstream>

using namespace std;

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

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() {
    in >> n;
    for (int i = 1; i <= n; ++i) {
        in >> h[i];
    }
    nh = n;
    
    //transform in 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--; //stergem varful heap-ului
        coboara(1);
    }
    for (int i = 1; i <= n; ++i) {
        out << h[i] << " ";
    }
    in.close();
    out.close();
    return 0;
}