number1 = int(input())
number2 = number1
x1 = number1%10
minimum = x1
count = 0
while number1 != 0:
    x2 = number1%10
    if x2 < minimum:
        minimum = x2
    number1 //= 10
while number2 != 0:
    x2 = number2%10
    if x2 == minimum:
        count += 1
    number2 //= 10
print(count)