import java.util.Scanner;

public class Main {
	static Scanner sc = new Scanner(System.in);

	public static void main(String[] args) {
		while(sc.hasNext()) {
			String[] numbers = sc.nextLine().split(" ");

			Integer ans = Integer.parseInt(numbers[0]) + Integer.parseInt(numbers[1]);
			System.out.println(String.valueOf(ans).length());
		}

	}

}
/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