import java.util.Scanner;

class Main{
  public static void main(String[] args){
    String[] data;
    Scanner sc = new Scanner(System.in);
    while(sc.hasNext()){
      data = sc.nextLine().split(" ");
      int digit = Integer.parseInt(data[0]) + Integer.parseInt(data[1]);
      System.out.println("" + Integer.toString(digit).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