import java.util.*;
import static java.util.Arrays.*;
import static java.lang.Math.*;
public class Main {

	static Scanner sc = new Scanner(System.in);
	
	public static void main(String[] args) {
		while (read()) {
			solve();
		}
	}
	
	static int a, b;
	static boolean read() {
		if (!sc.hasNextInt()) return false;
		a = sc.nextInt(); b = sc.nextInt();
		return true;
	}
	
	static void solve() {
		int sum = a + b, res = 0;
		while (sum > 0) {
			sum /= 10;
			res++;
		}
		System.out.println(res);
	}
}
/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