import java.util.StringTokenizer;
import java.io.*;

public class Main{
	public static void main(String[] args) throws IOException{
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		try{
			String input = br.readLine();
			StringTokenizer token;
			while(input != null){
				token = new StringTokenizer(input);
				int num = Integer.parseInt(token.nextToken()) + Integer.parseInt(token.nextToken());
				
				System.out.println((int)Math.log10(num) + 1);
				input = br.readLine();
			}
		}catch(Exception ex){
			System.exit(0);
		}
	}
}
/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