114-Final-1

#Missing Integer
def missing_integer(data):

    lst = list()
    for i in range(11):
        if i not in data:
            lst.append(i)

    return lst[0]

#Main Program
data = list()
while len(data) < 10:
    len_data = len(data)
    number = int(input("Input number (0-10) - Input %d: "%(len_data+1)))
    if number < 0 or number > 10:
        print("Warning: Please input number 0 to 10!")
        continue
    if number not in data:
        data.append(number)
    else:
        print(number,"is already taken.")

print(missing_integer(data))