Determine the matrix A = (aij) such that aij = i-j

The matrix `A = (aij)` such that `aij = i - j` is a matrix where the entry in the `i`-th row and `j`-th column is given by the difference between the row number `i` and the column number `j`. For example, the entry in the first row and first column would be `a11 = 1 - 1 = 0`, the entry in the second row and first column would be `a21 = 2 - 1 = 1`, and so on. However, to determine the matrix `A`, we need to know its dimensions, i.e., the number of rows and columns it has. Without this information, we cannot determine the matrix `A`.