import java.util.Scanner;
  
public class Main {
    public static void main(String[] args){
        int a,b;
        Scanner scanner = new Scanner(System.in);
        while(scanner.hasNext()){
        a = scanner.nextInt();
        b = scanner.nextInt();
        System.out.println((String.valueOf(a+b).length()));
        }
        scanner.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