
import java.util.Scanner;


public class Main{
	
	public static void main(String[] args){

		Scanner sc = new Scanner(System.in);
		int a, b;
		while(sc.hasNextInt()) {
			a = sc.nextInt();
			b = sc.nextInt();
			System.out.println(numOfDigit(a+b));
		}
		sc.close();
	}
	
	static int numOfDigit(int n) {
		return (int) Math.log10(n) + 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