
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.StringTokenizer;
 
public class Main {
 
    public static void main(String[] args) throws IOException {
         
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
         
        try {
             
            String s = br.readLine();
            StringTokenizer st;
             
            while (s != null) {
                st = new StringTokenizer(s);
                int p =Integer.parseInt(st.nextToken()) + Integer.parseInt(st.nextToken()) ;
                 
                System.out.println((int)Math.log10(p)+1);
                s =br.readLine();
            }
 
        } catch (Exception ex) {
            System.exit(0);
        }
    }
 
}
/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