BALTIC-WAY 2006 Problem 10
- Answer
162 pluses and 144 minuses are placed in a table in such a way that each row and each column contains at most 17 signs. (No cell contains more than one sign.) For every plus we count the number of minuses in its row and for every minus we count the number of pluses in its column. Find the maximum of the sum of these numbers.
Dataset text NuminaMath olympiads. Quoted with source.
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1296=72 \cdot 18
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