import java.util.*;
 
public class Main {
    public static void main(String args[] ) throws Exception {
    	
    	
    	 Scanner sc = new Scanner(System.in);
    	 int count = 0;
    	 
         while (sc.hasNext() && count<201){
             String s = sc.nextLine();
             String[] array = s.split(" ");
             
             int a = Integer.parseInt(array[0]);
             int b = Integer.parseInt(array[1]);
             
             int valLen = String.valueOf(a+b).length();
             System.out.println(valLen);
             
             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