# Mysterious Function

Can you identify the function f(x,y) which takes two positive integers as its argument?

 1 2 3 4 5 6 7 8 9 def f(x,y): minimum = min(x,y) maximum = max(x,y) if minimum == 0: return maximum elif minimum == 1: return 1 else: return f(minimum,maximum-minimum) 

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