Priority Queue Doubt

#1

priority_queue <int, vector, greater> gquiz;

why minHeap declaration is like the above line and whereas for maxHeap it is:
priority_queuepq; ?

#2

by default priority queue is max heap
so to create max heap we have write simply
priority_queue < int > pq;

but to create min heap we have to pass own comparator and vector as well like

priority_queue <int, vector, greater< int >> gquiz;

here greater is comparator

#3

why are passing vector actually?

#4

actually it is the part of syntax we have to pass this

may be this is used to store min heap but i am not sure
because it is not mention anywhere it is a adaptor conatiner

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