Problem asks for palindromes starting at 1, but test cases start at 100.
Now it goes down to 10, but wouldn't single digits be considered palindromes as well?
Additional test cases were added and the description slightly enhanced.
Change the sign of even index entries of the reversed vector
find the maximum element of the matrix
Sum of diagonals elements of a matrix
Create the following sequence : 0 1 1 4 9 25 64 169 ...
Find the dimensions of a matrix
Find the square of the sum of the digits of a number
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