import java.util.Scanner;

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

    while (in.hasNext()) {
      int n = in.nextInt();
      int ans = 0;
      int tenExp = 1;

      while (n > 0) {
        if (n % 10 == 9) {
          ans += 1 * tenExp;
        } else {
          ans += 9 * tenExp;        
        }

        n /= 10;
        tenExp *= 10;
      }

      System.out.println(ans);
    }
  }
}
/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