[priority_queue]

# include<iostream>
#include<queue>
using namespace std;
int main ( ){
	priority_queue<int> pque;
	pque.push(3);
	pque.push(5);
	pque.push(1);
	while(!pque.empty()){
		cout<<pque.top();
		pque.pop();
	}
	return 0;
}