#include
#include
#include
#include
using namespace std;
int main()
{
priority_queue pq;
cout << "A priority_queue for integers.\n";
pq.push(1);
pq.push(3);
pq.push(4);
pq.push(2);
cout << "retrieve those values in priority order.\n";
while(!pq.empty()) {
cout << "Popping ";
cout << pq.top() << "\n";
pq.pop();
}
cout << endl;
return 0;
}