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
How many trades represent all the profit?
frame of the matrix
Wind Chill Computation
ASCII sum of phrases
Repetition of matrices
count upper and lower case characters
Percentage of zeros in a matrix of only 1s and 0s
Raise each element to the power of its index in a matrix
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