import java.util.Scanner;

public class Main {
    public static void main(String[] args){
        int x,i;
        Scanner sc = new Scanner(System.in);
        while(sc.hasNextInt()) {
            x = sc.nextInt();
            x +=sc.nextInt();
            for (i = 1; x / 10 > 0; i++) {
                x = x / 10;
            }
            System.out.println(i);
        }
    }
}
/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