while True:
  try:
    a, b = map(int, input().split(" "))
    print(len(str(a + b)))

  except:
    break while True:
  try:
    a, b = map(int, input().split(" "))
    print(len(str(a + b)))

  except:
    break True try:
    a, b = map(int, input().split(" "))
    print(len(str(a + b)))

  except:
    break except:
    break break a, b = map(int, input().split(" ")) a map(int, input().split(" ")) map int input().split(" ") ().split () input split " " b print(len(str(a + b))) print len(str(a + b)) len str(a + b) str a + b a b a, b = map(int, input().split(" ")) map(int, input().split(" ")) a b = map(int, input().split(" ")) map(int, input().split(" ")) b
while True:
  try:
    a, b = map(int, input().split(" "))
    print(len(str(a + b)))

  except:
    break
