Red Alert!
Source: INMO 2024/2
January 21, 2024
combinatorics
Problem Statement
All the squares of a board are coloured white. In one move, Mohit can select one row or column whose every square is white, choose exactly squares in that row or column, and colour all of them red. Find maximum number of squares Mohit can colour in a finite number of moves.
Proposed by Pranjal Srivastava