import java.util.*;
public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    int answer = 0;
    if(n%111==0){
      System.out.println(n);
    }else{
    answer = (n/111)+1;
    answer = answer * 111;
    System.out.println(answer);
    }
  }
  

  
} import java.util.*; util.* java public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    int answer = 0;
    if(n%111==0){
      System.out.println(n);
    }else{
    answer = (n/111)+1;
    answer = answer * 111;
    System.out.println(answer);
    }
  }
  

  
} Main public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    int answer = 0;
    if(n%111==0){
      System.out.println(n);
    }else{
    answer = (n/111)+1;
    answer = answer * 111;
    System.out.println(answer);
    }
  } main {
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    int answer = 0;
    if(n%111==0){
      System.out.println(n);
    }else{
    answer = (n/111)+1;
    answer = answer * 111;
    System.out.println(answer);
    }
  } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int n = sc.nextInt(); n sc.nextInt() sc.nextInt sc int answer = 0; answer 0 if(n%111==0){
      System.out.println(n);
    }else{
    answer = (n/111)+1;
    answer = answer * 111;
    System.out.println(answer);
    } n%111==0 n%111 n 111 0 {
      System.out.println(n);
    } System.out.println(n) System.out.println System.out System System.out n {
    answer = (n/111)+1;
    answer = answer * 111;
    System.out.println(answer);
    } answer = (n/111)+1 answer (n/111)+1 (n/111) n 111 1 answer = answer * 111 answer answer * 111 answer 111 System.out.println(answer) System.out.println System.out System System.out answer String[] args args public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    int answer = 0;
    if(n%111==0){
      System.out.println(n);
    }else{
    answer = (n/111)+1;
    answer = answer * 111;
    System.out.println(answer);
    }
  }
  

  
} public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    int answer = 0;
    if(n%111==0){
      System.out.println(n);
    }else{
    answer = (n/111)+1;
    answer = answer * 111;
    System.out.println(answer);
    }
  }
  

  
} Main
import java.util.*;
public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    int answer = 0;
    if(n%111==0){
      System.out.println(n);
    }else{
    answer = (n/111)+1;
    answer = answer * 111;
    System.out.println(answer);
    }
  }
  

  
}