#include
using namespace std;
int main()
{
    vector v1 = {20, 30, 40, 25, 15};
    make_heap(v1.begin(), v1.end());
    cout << "The maximum element of heap is : ";
    cout << v1.front() << endl;
    v1.push_back(50);
    push_heap(v1.begin(), v1.end());
    cout << "The maximum element of heap after push is : ";
    cout << v1.front() << endl;
    pop_heap(v1.begin(), v1.end());
    v1.pop_back();
    cout << "The maximum element of heap after pop is : ";
    cout << v1.front() << endl;
    
    return 0;
}