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.
Times 2 - START HERE
Swap the first and last columns
Roll the Dice!
Convert a number to its Roman representation
Find the area of the four walls
Create the following sequence : 0 1 1 4 9 25 64 169 ...
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