At a minimum, you should make this problem variable. For example, find the element at the ith row and jth column and define i and j in the test cases, which are passed along with the function.
Inner product of two vectors
Project Euler: Problem 1, Multiples of 3 and 5
How to subtract?
Rotate a Matrix by 90 degrees
Rotate array 90 degrees
modulus of a number
Find remainder when x is divided by 3
first element of matrix
find the mean of all elements in a matrix
Calculating selling price
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