Accept_Positive_&_Subtract_Number.py

'''Write a Python program that accept a positive number and subtract from this number the sum of its digits
and so on. Continues this operation until the number is positive.'''

def repeat_times(n):
    s = 0
    n_str = str(n)
    while (n > 0):
        n -= sum([int(i) for i in list(n_str)])
        n_str = list(str(n))
        s += 1
    return s
print(repeat_times(9))
print(repeat_times(21))