import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {
	public static void main(String[] args) {
		print();
	}

	private static void print() {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		try {
			String str = br.readLine();
			while (str != null) {

				String[] nums = str.split(" ", 0);

				int x = Integer.parseInt(nums[0]);
				int y = Integer.parseInt(nums[1]);

				int keta = Integer.toString(x+y).length();

				System.out.println(keta);
				str = br.readLine();

			}
		} catch (IOException e) {
			e.printStackTrace();
		}

	}

}
/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