my-solutions/leetcode/1582-special-positions-in-a-binary-matrix/readme.md

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# 1582. Special Positions in a Binary Matrix
Given an m x n binary matrix mat, return the number of special positions in mat.
A position (`i`, `j`) is called special if `mat[i][j]` == `1`
and all other elements in row `i` and column `j` are `0` (rows and columns are 0-indexed).