3주차 실습-(1)

def remove_sign(s):
    s = str(s)
    if s[0] == "+":
        return s[1:]
    elif s[0] == "-":
        sign = s[0]
        return s[1:]
    else:
        return s

def get_int_signed(message):
    sign = 0
    s = str(input(message))
    while not remove_sign(s).isdigit():
        s = str(input(message))
    if sign == "-":
        return sign + s
    s = int(s)
    return s


print(get_int_signed("정수를 입력하시오"))