n = int(input())
i = 0
while n > 0:
    n //= 10
    i += 1
print(i)
----------
n = int(input())
i = 0
while n > 0:
    if n % 2 == 0:
        i += 1
    n //= 10
print(i)
-----------
n = int(input())
i = n % 10
while n > 9:
    n //= 10
print(i + n)
------------
n = int(input())
i = 1
s = 0
while i <= n // 2  + 1:
    if n % i == 0:
        s += i
    i += 1
print(s == n)