How to write Euclid's Algorithm using a stack method in Python?

Question

looking for help here!

Does anyone know how to convert the recursive version of Euclid's algorithm (to find the greatest common divisor GCD) into a version that uses STACK?

Here is the recursive version of Euclid's algorithm:

def euclid_gcd(a, b):
    if a == 0:
        return b
    return gcd(b%a, a)

Right now I have a starting code to convert to a STACK version of Euclid's algorithm:

def euclid_gcd_stack(a, b):
    s = Stack()
    s.push(a)
    s.push(b)

    while s.count() > 0:
        b = s.pop()
        a = s.pop()

 <code to be continued here>

Thank you in advance: :)

Answer 1

def euclid_gcd_stack(a, b):
    s = Stack()
    s.push(a)
    s.push(b)

    while s.count() > 0:
        b = s.pop()
        a = s.pop()

        if a > b:
            a, b = b, a
        if a == 0:
            return b
        else:
            s.push(a)
            s.push(b - a)
``