Just find the number of columns of the given matrix.
x = [1 2
y = 2
Maby this one needs some more test suites ;)
improve test suit
Maybe more test cases here? ;-)
Reverse Run-Length Encoder
Make a Palindrome Number
Make one big string out of two smaller strings
Number of 1s in a binary string
Reverse a matrix
Find the square of the sum of the digits of a number
Find the area of the four walls
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