import java.util.Scanner;
public class Main {
	public static void main(String[] a) {
		Scanner s=new Scanner(System.in);
		int x,y,z,i;
		while(s.hasNext()){
			x=s.nextInt();
			y=s.nextInt();
		z=x+y;
		for(i=1;10<=z;i++){
			z=z/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