/* Volume0 0002 Digit Number */
import java.util.Scanner;

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

		Scanner stdIn = new Scanner(System.in);

		while( stdIn.hasNext()){
			System.out.println( (int)Math.log10(stdIn.nextInt()+stdIn.nextInt())+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