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


public class Main {

	/**
	 * @param args
	 * @throws IOException
	 */
	public static void main(String[] args) throws IOException {
		// TODO ツ篠ゥツ督ョツ青カツ青ャツつウツづェツつスツδソツッツドツ・ツスツタツブ
		BufferedReader d= new BufferedReader(new InputStreamReader(System.in));
		String temp;
		while((temp	=d.readLine())!= null){
			String array[]=temp.split(" ");

			int a=Integer.valueOf(array[0]).intValue(),b=Integer.valueOf(array[1]).intValue();
			String sum =String.valueOf(a+b);
			System.out.println(sum.length());
		}
	}
}
/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