import java.util.*;

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

    int num = (n-1)/111 + 1;
    System.out.println(num*111);
  }
} 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 num = (n-1)/111 + 1;
    System.out.println(num*111);
  }
} Main public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();

    int num = (n-1)/111 + 1;
    System.out.println(num*111);
  } main {
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();

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

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

    int num = (n-1)/111 + 1;
    System.out.println(num*111);
  }
} Main
import java.util.*;

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

    int num = (n-1)/111 + 1;
    System.out.println(num*111);
  }
}
