import java.util.Scanner;
public class Main {
	public static void main(String[] args) throws java.io.IOException {
		Scanner scan = new Scanner(System.in);
		while(scan.hasNext()){
			int a = scan.nextInt();
			int b = scan.nextInt();
			int s = a + b;
			String S = String.valueOf(s);
			if(a == 0 && b == 0){
				System.out.println("0");
			}else{
				System.out.println(S.length());
			}
		}
	}
}
/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