Leetcode problem 782. Transform to Chessboard.

[vermaaarti]

Hey @Saikat2407, I would like to contribute to this problem, Please do assign it to me.
Where:
given an n x n binary grid board. In each move, you can swap any two rows with each other, or any two columns with each other.

Return the minimum number of moves to transform the board into a chessboard board. If the task is impossible, return -1.