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MathNet 2018-part-06 — 181 problems (EN–VI) Question 56

Math Olympiad Vault · MathNet 2018-part-06 — 181 problems (EN–VI)

Question 56

In how many ways can every unit square of a $2018 \times 2018$ board be coloured red or white such that the numbers of red unit squares in any two rows are distinct and the numbers of red unit squares in any two columns are distinct?