import java.util.*;
import java.io.*;
 
class Main{
    public static void main(String[] args)throws IOException{
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String s;
        int num = 0;
        while((s=br.readLine())!=null){
            String[] str = s.split(" ");
            if(Integer.parseInt(str[0])<0 || Integer.parseInt(str[0])>1000000 ||
               Integer.parseInt(str[1])<0 || Integer.parseInt(str[1])>1000000){
                
                    continue;
            }
            num = Integer.parseInt(str[0]) + Integer.parseInt(str[1]);
            //System.out.println(str[0]+"\t"+str[1] + "\t"+num);
            int a = String.valueOf(num).length();
            System.out.println(a);
        }
         
         
    }
}
/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