Its simple. You have to reverse a given matrix.
The problem is really to just reverse a row vector. A row vector happens to be a matrix, but so does a column vector, and two or more dimensional matrices. Saying, "reverse a matrix" is ambiguous.
Make a checkerboard matrix
Generate a vector like 1,2,2,3,3,3,4,4,4,4
construct matrix with identical rows
Find the dimensions of a matrix
Concatenate two strings
Find the area of the four walls
Find the square of the sum of the digits of a number
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