import java.util.*;

class Main{
 public static void main(String[] args){
  Scanner s = new Scanner(System.in);

while(s.hasNext()){
 int a = s.nextInt();
 int b = s.nextInt();
 a += b;
 String c = String.valueOf(a);
 System.out.println(c.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