import static java.lang.Integer.parseInt;
import java.io.*;

class Main{
    public static void main(String[] a) throws IOException{

        BufferedReader input = new BufferedReader(new InputStreamReader(System.in));
        String s;

        while((s = input.readLine())!=null){
            String[] num = s.split(" ",0);
            int x = parseInt(num[0]);
            int y = parseInt(num[1]);
            if(0 <= x && x <=1000000 && 0 <= y && y <= 1000000){
                int z = x + y;
                System.out.println(Integer.toString(z).length());
            }
        }
    }
}
/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