Given an input variable x, output a variable y that is equal in value to x.
Input x = 1
Output y is 1
Input x = 5
Output y is 5
Not as simple as it seems.
it seems easy
Return the 3n+1 sequence for n
radius of a spherical planet
Back to basics 23 - Triangular matrix
Reverse the elements of an array
Sum of series I
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