What is the output of the following C++ program?#include #include #include #include using namespace std; int main() { priority_queue a; pri…

What is the output of the following C++ program?

#include <iostream>
#include <queue>
#include <vector>
#include <functional>
using namespace std;
int main() {
    priority_queue<int> a;
    priority_queue<int, vector<int>, greater<int>> b;
    for (int x : {5, 1, 8, 3}) { a.push(x); b.push(x); }
    a.pop(); b.pop();
    cout << a.top() << b.top();
    return 0;
}