Grand temple poblem

#1

what would be size of grid ?
it’s not mentioned exclusively in question.

#2

assume grid to be infinte size , becasue size of grid dont matter in the question

#3

then always largest area would be infinity.

#4

or we consider only river surrounded area.

Surrounded area would be finite if only if number of given coordinate > 1.

#5

yes!!
only consider those rectangles which are surrounded on all four sides ,