Write a function that will return same output as diag(spiral(n)). The only exception is that spiral and diag functions are not allowed in your function. Also, loops are not allowed.
This really violates the spirit of the problem.
I know... :-p
it was quick and dirty. I will come again to solve it right. ;-)
Project Euler: Problem 6, Natural numbers, squares and sums.
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longest common semi-substring
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