import java.util.Scanner;


public class Main {
	public static void main(String[] args) {
		//??????????????°
		Scanner sc;		//??\???
		int a=0;
		int b=0;
		int kotae=0;
		int i=0;

		sc = new Scanner(System.in);

		while(sc.hasNext()){

			a = sc.nextInt();
			b = sc.nextInt();
			kotae = a + b;

			String skotae = String.valueOf(kotae);
			int keta = skotae.length();

			System.out.println(keta);
			i= i+1;
		}
	}
}
/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