Getting wrong answer in hostel visit

#1

https://ide.codingblocks.com/s/78269 this is the link of my code
i m getting wrong answer please look into it

#2


i changed your code a little because x^2 cant be stored in integer

#3

sir cant i implement it with min heap instead of max heap

#4

from a pririty queue we can always have topmost element with us.
therefore using max heap would do fine .
if the size of max heap is above k yu delete topmost elements because you never need them.
so max heap always has a size of k , where the top most element is the kth maximum element