import java.util.Scanner;

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

    while( scan.hasNext() ) {
      int x = scan.nextInt();
      int y = scan.nextInt();
      int z = 1;
      int out = 0;
      while( true ) {
        int r = ( x + y ) / z;
        if( r == 0 ) {
          break;
        } else {
          z *= 10;
          out++;
        }
      }
      System.out.println(out);
    }
  }
}
/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