import java.util.Scanner;

public class Main {

	public static void main(String[] args) {

		int a,b;

		Scanner scan = new Scanner(System.in);

		while ((scan.hasNext())) {

			a = Integer.parseInt(scan.next());
			b = Integer.parseInt(scan.next());

			String length = String.valueOf(a + b);

			System.out.println(length.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