import java.util.Scanner;

public class Main {

    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);
        while (sc.hasNext()) {
            String[] array = sc.nextLine().split("[\\s]");
            int n1 = Integer.parseInt(array[0]);
            int n2 = Integer.parseInt(array[1]);

            int num = n1 + n2;
            System.out.println(Integer.toString(num).length());
        }
        sc.close();

    }

}
/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