import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		
		String[] data;
		
		Scanner scanner = new Scanner(System.in);
		
	
		while(scanner.hasNext()) {
			data = scanner.nextLine().split(" ");
			int dataInt = Integer.parseInt(data[0]) + Integer.parseInt(data[1]);
			System.out.println(String.valueOf(dataInt).length());
		}
		
		scanner.close();
		
	}

}
/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