import java.util.Scanner;

class Main
{
    public static void main(String[] agrs)
    {
        Scanner input = new Scanner(System.in);
        while(input.hasNext())
        {
            int a = input.nextInt();
            int b = input.nextInt();
            String s = Integer.toString(a + b);
            System.out.println(s.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