Question: A positive integer n is said to be Pythagorean if there exist two positive integers a and b such that a 2 + b 2

A positive integer n is said to be Pythagorean if there exist two positive integers
a and b such that a2+b2= n2. Present an O(n) time algorithm to check if a given
positive integer n is Pythagorean or not. Assume that you can find the square root
of any number in O(1) time.

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