백준 #1110

python

n = int(input())
new = n
count = 0

while True:
    tmp = new // 10 + new % 10  # 2 + 6 = 8, 6 + 8 = 14
    new = int(str(new % 10) + str(tmp % 10))  # "6" + "8" = 68, "8" + "4" = 84
    count += 1
    if n == new:
        break

print(count)