Hints required for logic formation

#1

could you please provide me with some hints regarding this
the question which I could use to solve this question?

#2

The following problem can be easily solved by using priority Queue.
For every query of type 1, insert elements until the size of the heap becomes ‘k’.
Then for every query of type 1 after reaching the size k for heap(max-heap) we will check if the current element is smaller than the root of the heap or not. If it is not smaller then we ignore it else we remove the root of the heap and push the new element in the heap. (What this will do is maintain a heap of size k which will contain k nearest coordinates for the dean) .
For every query of type 2 just print the root of the heap.