olymmath

HMMT 2020 U12

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An 11×1111 \times 11 grid is labeled with consecutive rows 0,1,2,…,100,1,2, \ldots, 10 and columns 0,1,2,…,100,1,2, \ldots, 10 so that it is filled with integers from 1 to 2102^{10}, inclusive, and the sum of all of the numbers in row nn and in column nn are both divisible by 2n2^{n}. Find the number of possible distinct grids.

Dataset text NuminaMath olympiads. Quoted with source.

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2^{1100}

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