import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner scan=new Scanner(new BufferedReader(new InputStreamReader(System.in)));
		try {
			int x,y;
			while(scan.hasNext()){
				x=scan.nextInt();
				y=scan.nextInt();
				System.out.println(Integer.toString(x+y).length());
				
			}
		} catch (Exception e) {
			// TODO: handle exception
		}
	}

}
/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