从右到左从整数减去数字

def subtract_from_right_to_left(integer, number):
    integer_str = str(integer)
    number_str = str(number)
    result = ""
    borrow = False

    for i in range(len(integer_str)-1, -1, -1):
        digit = int(integer_str[i])
        subtract = int(number_str[i]) if i < len(number_str) else 0

        if borrow:
            digit -= 1
            borrow = False

        if digit < subtract:
            digit += 10
            borrow = True

        result = str(digit - subtract) + result

    if result[0] == '0':
        result = result[1:]

    return int(result)

# 示例调用
integer = 12345
number = 6789
result = subtract_from_right_to_left(integer, number)
print(result)  # 输出：55656