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MathNet 2010 — Part 01 Question 147

Math Olympiad Vault · MathNet 2010 — Part 01

Question 147

Integers are written in the cells of a table $2010 \times 2010$. Adding $1$ to all the numbers in a row or in a column is called a *move*. We say that the table is *equilibrium* if one can obtain after finitely many moves a table in which all the numbers are equal.


a) Find the largest positive integer $n$, for which there exists an equilibrium table containing the numbers $2^0, 2^1, \dots, 2^n$.


b) For this $n$, find the maximal number that may be contained in such a table.