Iberoamerican 2017 problem 3
Source: Iberoamerican 2017 p. 3
September 20, 2017
combinatoricsIberoamericaninternational competitions
Problem Statement
Consider the configurations of integers
a_{2,1} a_{2,2}
a_{3,1} a_{3,2} a_{3,3}
\dots \dots \dots
a_{2017,1} a_{2017,2} a_{2017,3} \dots a_{2017,2017}
Where for all such that .
Determine the maximum amount of odd integers that such configuration can contain.