Y by
In some cells of the table
crosses are placed. A set of 2025 cells we will call balanced if no two of them are in the same row or column. It is known that any balanced set has at least
crosses.
Find the minimal
for which it is always possible to color crosses in two colors such that any balanced set has crosses of both colors.


Find the minimal

This post has been edited 1 time. Last edited by nAalniaOMliO, Mar 29, 2025, 10:41 AM