output_description: Print the minimum possible value of "the sum of the digits of A" plus "the sum
  of the digits of B".
  
  * * *
input_description: Input is given from Standard Input in the following format:
  
      
      
      N
attempt: n = int(input()
  list = []
  for a in range(2,n-1):
          sum = 0
          sum1 = 0
          b = n - a
          for j in range(len(str(a))):
                  sum += int(str(a)[j])
          for k in range(len(str(b))):
                  sum1 += int(str(b)[k])
          list.append(sum + sum1)
  print(min(list))
problem_description: Statement
  
  Takahashi has two positive integers A and B.
  
  It is known that A plus B equals N. Find the minimum possible value of "the
  sum of the digits of A" plus "the sum of the digits of B" (in base 10).
samples: [{"input": "15", "output": "6\n    \n\nWhen A=2 and B=13, the sums of their digits are 2 and 4, which minimizes the\nvalue in question.\n\n* * *"}, {"input": "100000", "output": "10"}]