import java.util.*;
import java.util.Scanner ; 
import java.math.BigInteger;

public class Main {
    public static void main(String[] args) {
        BigInteger a,b,r;
        Scanner sc = new Scanner(System.in);
        String s;
        while(sc.hasNextBigInteger()){
            a = sc.nextBigInteger();
            b = sc.nextBigInteger();
            r = a.add(b);
            s = r.toString();
            System.out.println(s.length());
        }  
    }
}
/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