import java.util.Scanner;
public class Main {
    public static void main (String[] args) {
	Scanner scan = new Scanner(System.in);
	int a, b;
	String[] input;
	while (scan.hasNext()) {
	    input = scan.nextLine().split(" ");
	    a = Integer.parseInt(input[0]);
	    b = Integer.parseInt(input[1]);
	    System.out.println(determineDigits(a+b));
	}
    }
    static int determineDigits (int a) {
	int digits = 0;
	while (a > 0) {
	    digits ++;
	    a /= 10;
	}
	return digits;
    }
}
/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