import java.util.*;
public class Main {
	public static void main(String[] args){
	 
	Scanner sc= new Scanner (System.in);
	int a=0;
	int b=0;
	int c=0;
	while (sc.hasNext()) {
		a = sc.nextInt();
		b = sc.nextInt();
		c = a + b;
		int	count = 0;
		do {
			c /= 10;
			count++;
		} while(c != 0);
		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