#include <iostream>
#include <queue>
using namespace std;



int main()
{
    priority_queue<int> pq;
    pq.push(3);
    pq.push(2);
    pq.push(1);
    pq.push(4);
    pq.push(5);

    while(!pq.empty()) {
        cout << pq.top() << endl;
        pq.pop();

    }
    return 0;
}