import java.util.Scanner;

class Main {
	public static void main(String[] args){
		try(Scanner sc = new Scanner(System.in)){
			while(sc.hasNextInt()){
				int a=Integer.parseInt(sc.next());
				int b=Integer.parseInt(sc.next());
				int digit = 1;
				int n=0;
				while((a+b)>=digit){
					digit=digit*10;
					n++;
				}
				System.out.println(n);
				
			}
		}
	}
}
/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