[백준/python] 1110번 - 더하기 사이클

n = int(input())

check = n # 26
count = 0
result = 0
new_num = 0

while True:
    result = n//10 + n%10
    new_num = n%10*10 + result%10
    count += 1
    n = new_num
    if check == n:
        break
print(count)