
import java.util.Scanner;

public class Main {
	public static void main(String args[]){
		Scanner sc = new Scanner(System.in);
		int a,b,x,count =0;
		int []result = new int[200];
		for(int i = 0;;i++){
			if(sc.hasNext() == false) break;
			a = sc.nextInt();
			b = sc.nextInt();
			x = a + b;
			for(int j = 1;;j++){
				if(x >= 10){
					x = x/10;
				} else {
					result[i] = j;
					count++;
					break;
				}
			}
		}
		for(int i = 0; i < count; i++){
			System.out.println(result[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