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

class Main{
    public static void main(String[] a) throws IOException{
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String line;
        while((line = br.readLine()) != null){
            String[] check = line.split(" ");
            int val1 = Integer.parseInt(check[0]);
            int val2 = Integer.parseInt(check[1]);
            int sum = val1 + val2;
            String str = String.valueOf(sum);
            System.out.println(str.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