# usr/bin/python
# coding: utf-8
################################################################################
# Digit Number
# Write a program which computes the digit number of sum of two integers a and b.
#
# Input
# 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.
#
# Constraints
# 0 ??? a, b ??? 1,000,000
# The number of datasets ??? 200
# Output
# Print the number of digits of a + b for each data set.
#
# Sample Input
# 5 7
# 1 99
# 1000 999
# Output for the Sample Input
# 2
# 3
# 4
#
################################################################################

import math
import fileinput

if __name__ == "__main__":
    for line in fileinput.input():
        a = int(line.split(" ")[0])
        b = int(line.split(" ")[1])
        data_size = int(math.log10(a+b) + 1)
        print(data_size)
    exit(0)
   import math math import fileinput fileinput if __name__ == "__main__":
    for line in fileinput.input():
        a = int(line.split(" ")[0])
        b = int(line.split(" ")[1])
        data_size = int(math.log10(a+b) + 1)
        print(data_size)
    exit(0)
   __name__ == "__main__" __name__ "__main__" for line in fileinput.input():
        a = int(line.split(" ")[0])
        b = int(line.split(" ")[1])
        data_size = int(math.log10(a+b) + 1)
        print(data_size)
     line fileinput.input() fileinput.input fileinput input a = int(line.split(" ")[0]) a int(line.split(" ")[0]) int line.split(" ")[0] line.split(" ") line.split line split " " 0 b = int(line.split(" ")[1]) b int(line.split(" ")[1]) int line.split(" ")[1] line.split(" ") line.split line split " " 1 data_size = int(math.log10(a+b) + 1) data_size int(math.log10(a+b) + 1) int math.log10(a+b) + 1 math.log10(a+b) math.log10 math log10 a+b a b 1 print(data_size) print data_size exit(0) exit 0 b = int(line.split(" ")[1]) int(line.split(" ")[1]) b data_size = int(math.log10(a+b) + 1) int(math.log10(a+b) + 1) data_size a = int(line.split(" ")[0]) int(line.split(" ")[0]) a
# usr/bin/python
# coding: utf-8
################################################################################
# Digit Number
# Write a program which computes the digit number of sum of two integers a and b.
#
# Input
# 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.
#
# Constraints
# 0 ??? a, b ??? 1,000,000
# The number of datasets ??? 200
# Output
# Print the number of digits of a + b for each data set.
#
# Sample Input
# 5 7
# 1 99
# 1000 999
# Output for the Sample Input
# 2
# 3
# 4
#
################################################################################

import math
import fileinput

if __name__ == "__main__":
    for line in fileinput.input():
        a = int(line.split(" ")[0])
        b = int(line.split(" ")[1])
        data_size = int(math.log10(a+b) + 1)
        print(data_size)
    exit(0)
  