solutions are rounded in a somewhat arbitrary fashion...
Your value of pi is wrong.
The problem should specify that the used value for pi is 3.1416 (since this is not its true value), and that we need to use floor with precision of 4 decimal places.
Add two numbers
Min of a Matrix
Compute Fibonacci Number
Back to basics - mean of corner elements of a matrix
Determine the length of a string of characters
Throw common elements of two vector arrays
Xor of matrix
Find minimum and maximum elements of an array
Delete blanks at the end of string
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