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*-1 byte by replacing compositepi(k) with k+~primepi(k).
compositepi(k)
k+~primepi(k)
lambda k:totient(compositepik+~primepi(k)) from sympy.ntheory import*
Try it online!Try it online!
lambda k:totient(compositepi(k)) from sympy.ntheory import*
Try it online!
lambda k:totient(k+~primepi(k)) from sympy.ntheory import*
