import java.util.*;
import java.io.*;
import java.math.*;
 

class Main
{
	public static void main(String args[])throws IOException
	{
		BufferedReader d=new BufferedReader(new InputStreamReader(System.in));

		String line="";
		while((line=d.readLine())!=null)
		{
			String[] str = line.split(" ");
			int a=Integer.parseInt(str[0]);
			int b=Integer.parseInt(str[1]);
			int sum=a+b;
			int count=1;

			while(sum>=10)
			{
				count++;
				sum/=10;
			}
			System.out.println(count);
		}
	}
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz