import java.util.*;

class Main {
  public static void main(String[] args) {

    Scanner sc = new Scanner(System.in);
    
    int N = sc.nextInt();
    
    int s = N / 100;
    if(N > (100*s + 10*s + s)) {
      System.out.println(100*(s+1) + 10*(s+1) + (s+1));
    } else {
      System.out.println(100*s + 10*s + s);
    }
  }
}
/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