not able to understand the question
Grand temple problem
to find the max area, and for having an area you must have a rectangle for that you will need 4 points and for given test case we found that 2,2), (2,4), (5,2), (5,4) these are the 4 points which will give us the maximum area. There is one thing you need to keep in mind while calculating the area i.e. the area will be calculated from the edge next to the left edge, the edge above the bottom edge, the topmost edge and the rightmost edge, therefore for the region (2,2) , (2,4) , (5,2) , (5,4) the actual area will be considered from (3,3), (3,4), (5,3), (5,4) respectively.
so ans is 2
area will be calculated from the edge next to the left edge, the edge above the bottom edge, the topmost edge and the rightmost edge
this is because:
To understand this look at this figure given below

ignore those pillars and assume the dark rows and columns as rivers . So, in this picture you can see that if I am saying a river at (3,0) that means the width of the river is from 3,0 to 4,0 and in this way if you want to calculate the area to make temple you have to consider it from one next to the point where river is flowing.
i hope you understand if yes then hit a like.