Problem 44096. Matrix game: Winner takes all
Given a matrix A, return a new matrix of the same size in which the biggest element of each column in A takes 1, and 0 for all the others. So if:
input A = [5 4 3; 1 5 6; 3 0 9]
output a = [1 0 0; 0 1 0; 0 0 1]
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