MathDB
Counting grid configurations with \pm 1

Source: Romanian TST 1979 Day 1 P5

April 15, 2023
combinatoricscounting

Problem Statement

In how many ways can we fill the cells of a m×nm\times n board with +1+1 and −1-1 such that the product of numbers on each line and on each column are all equal to −1-1?
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