For given input matrix a, rotate it by 90 degrees and find the sum of the diagonals.
1 2 3 4
5 6 7 8
8 10 12 -2
-1 -3 -5 -7
Get the elements of diagonal and antidiagonal for any m-by-n matrix
Celsius to Fahrenheit converter
Evaluating a polynomial
Beginner's Problem - Squaring
count upper and lower case characters
surface areas of a cylinder
Calculating the total earnings of a factory
Find NaNs in the matrix
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