import java.util.Scanner;

class Main{



    public static void main(String[] a){


        Scanner sc = new Scanner(System.in);

        while(sc.hasNext()) {


	        	int z = sc.nextInt();
	        	int y = sc.nextInt();

	        	int ans = z + y;
	        	String ansSt = String.valueOf(ans);
	        	int ansK = ansSt.length();
	        	System.out.println(ansK);

        }

        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