Add only the positive numbers of x
x = [-2 -1 0 1 2 3]
the positive numbers are: 1 2 3, so their sum is 6
Project Euler: Problem 1, Multiples of 3 and 5
Basics: 'Find the eigenvalues of given matrix
Will there be a new leader?
Compute Fibonacci Number
All odd - all even
Reduce the logic
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