import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int count =0;
		
		while(sc.hasNext() && count < 201){
			
				String a = sc.nextLine();
	            String[] array = a.split(" ");
				int x = Integer.parseInt(array[0]);
				int y = Integer.parseInt(array[1]);
				int val = x+y;
				int valLen = String.valueOf( val ).length();
				System.out.println(valLen);
			
				count++;
			
		}
	}
}
/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