
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner stdIn = new Scanner(System.in);
		while (stdIn.hasNextInt()) {
			int n = stdIn.nextInt();
			int i = stdIn.nextInt();
			int cou = 0;
			int ni=n+i;
			while(ni>0){
				ni/=10;
				cou++;
			}
			System.out.println(cou);
		}
	}
}
/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