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

public class Main {
    public static void main(String[] args) {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        int[] top3 = new int[3];
        String line;
        try {
            while((line = br.readLine()) != null){
                String[] numbers = line.trim().split(" ");
                int a = Integer.parseInt(numbers[0]);
                int b = Integer.parseInt(numbers[1]);
                System.out.println(Integer.toString(a+b).length());
            }
        } catch (IOException e) {
        }
    }
}
/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