import java.util.Scanner;

class Main {	
	public static void main(String args[]){
		Scanner scan = new Scanner(System.in);
		int count;
		
		while(scan.hasNextInt()){
			count = 1;
			int addNum = scan.nextInt() + scan.nextInt();
			while(addNum>=10){
				count++;
				addNum/=10;
			}
			System.out.println(count);
		}
	}
}
/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