What will be the output of the following C++ code?

#include <iostream>
#include <queue>
using namespace std;
int main ()
{
    priority_queue<int> mypq;
    mypq.push(30);
    mypq.push(100);
    mypq.push(25);
    mypq.push(40);
    while (!mypq.empty())
    {
        cout << " " << mypq.top();
        mypq.pop();
    }
    cout << endl;
    return 0;
}