output_description: Print the number of digits of a \+ b for each data set.
input_description: There are several test cases. Each test case consists of two non-negative
  integers a and _b_ which are separeted by a space in a line. The input
  terminates with EOF.
attempt: n = input()
  n = n.split(" ")
  print(n)
  a = 0
  for i in n:
      a += int(i)
  print(len(str(a)))
  
problem_description: Digit Number
  
  Write a program which computes the digit number of sum of two integers a and
  b.
samples: [{"input": "7\n    1 99\n    1000 999", "output": "3\n    4"}]