#include <bits/stdc++.h>
using namespace std;
int main ()
{
priority_queue <int> pq;
pq.push(5);
pq.push(1);
pq.push(10);
pq.push(30);
pq.push(20);
while (pq.empty() == false)
{
cout << pq.top() << " ";
pq.pop();
}
return 0;
}