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

public class Main{

	public static void main (String[] args) throws IOException{
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String line;
		
		while ((line = br.readLine()) != null) {
			String[] numbers = line.split(" ");
			int sum = 0;
            int a = Integer.parseInt(numbers[0]);
            int b = Integer.parseInt(numbers[1]);
            sum = a + b;
            
            int ans = 1;
            while((sum /= 10) > 0){
            	ans++;
            }
            System.out.println(ans);
        }
	}
}
/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