import java.util.Scanner;
import java.util.Arrays;
public class Main
{
	public static void main(String args[])
	{
		Scanner input = new Scanner(System.in);
        int a, b, count;
        while( input.hasNext() )
        {
            a = input.nextInt();
            b = input.nextInt();
            a += b;
            count = 0;
            while( a > 0 )
            {
                count ++;
                a /= 10;
            }
            System.out.println( count );
        }
	}
}
/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