سير العمل البرمجي · معاملات بيزو الصحيحة

def bezout(a, b):
    if any(type(v) is not int or abs(v) >= 10**100 for v in (a, b)):
        raise ValueError("integer.range")
    old_r, r = abs(a), abs(b)
    old_s, s, old_t, t = 1, 0, 0, 1
    while r:
        q = old_r // r
        old_r, r = r, old_r - q * r
        old_s, s = s, old_s - q * s
        old_t, t = t, old_t - q * t
    return old_r, old_s * (-1 if a < 0 else 1), old_t * (-1 if b < 0 else 1)