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

class Main{
    public static void main(String[] args) throws IOException {
        
        Scanner scan = new Scanner(System.in);
        while (scan.hasNext()){
            int v1 = scan.nextInt();
            int v2 = scan.nextInt();
            String s = String.valueOf(v1 + v2);
            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