Collisions

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Once N boys and M girls attended a party. You are given a matrix A of N rows and M columns where Aij is 1 if the i-th boy likes the j-th girl, otherwise it will be 0. Note that it is not necessary that if a boy x likes girl y, then girl y should like boy x. You know that if there are two different boys x and y, who both like girl z, then there will be a collision. Can you calculate the number of

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solution.cppC++17

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