Problem:
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

Solution in C# (judge verdict: Accepted)

using System;

namespace AOJ
{
    class DigitNumber
    {
        public static void Main(string[] args)
        {
            for (int i = 0; i < 200; i++)
            {
                string input = Console.ReadLine();
                if (string.IsNullOrEmpty(input)) { break; }

                var tmp = input.Split(' ');

                int test = int.Parse(tmp[0]) + int.Parse(tmp[1]);
                Console.WriteLine(test.ToString().Length);
            }
        }
    }
}