import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		// TODO ?????????????????????????????????????????????
		//?????????????????????
	    Scanner scan = new Scanner(System.in);

        while(scan.hasNext()) {
          	    String num1 = scan.next();
	 	int int1 = Integer.parseInt(num1);

	    String num2 = scan.next();
	    int int2 = Integer.parseInt(num2);

	    int kei = int1 + int2;
	    int keilen = String.valueOf(kei).length();
	    System.out.println(keilen);
        }
	    scan.close();

}
}
/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