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: a, b = map(int, input().split())
  c = a + b
  ans = 0
  if c >= 0 and c <= 9:
      ans = 1
  if c >= 10 and c <= 99:
      ans = 2
  if c >= 100 and c <= 999:
      ans = 3
  if c >= 1000 and c <= 9999:
      ans = 4
  if c >= 10000 and c <= 99999:
      ans = 5
  if c >= 100000 and c <= 999999:
      ans = 6
  if c >= 1000000 and c <= 9999999:
      ans = 7
  print(ans)
  
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"}]