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;using System.Collections.Generic;class MainClass{public static void Main(string[]args){string str;List<int>digit=new List<int>();while(!string.IsNullOrEmpty(str=Console.ReadLine())){string[]input=str.Split(' ');int a=int.Parse(input[0]);int b=int.Parse(input[1]);int c=a+b;digit.Add(c.ToString().Length);}
for(int i=0;i<digit.Count;i++){Console.WriteLine(digit[i]);}
Console.Read();}}