def gcd(a: int, b: int) -> int:
    assert ((a > 0) and (b > 0))
    if (evaluate_condition(1, 'Eq', a, 1) or evaluate_condition(2, 'Eq', b, 1)):
        return 1
    if evaluate_condition(3, 'Eq', a, b):
        return a
    if evaluate_condition(4, 'Gt', b, a):
        (a, b) = (b, a)
    while evaluate_condition(5, 'NotEq', b, 0):
        temp = b
        b = (a % b)
        a = temp
    return a