import java.util.Scanner;

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

		while (sc.hasNext()) {
			int a = sc.nextInt();
			int b = sc.nextInt();

			int ans = 0;
			a += b;
			while (a > 0) {
				ans++;
				a /= 10;
			}
			System.out.println(ans);
		}
	}

	public static void main(String[] args) {
		new Main().run();
	}
}
/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