import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int[] sum = new int[200];
		int i=0;
		while(sc.hasNext()){
			sum[i] = sc.nextInt() + sc.nextInt();
			i++;
		}
		
		for(int j=0;j<i;j++){
			int k=0;
			while(sum[j]!=0){
				k++;
				sum[j] /= 10;
			}
			System.out.println(k);
		}
	}
}
/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