import java.lang.reflect.Array;
import java.util.*;
public class Main{
    public static void main(String[] args)throws Exception{
        Scanner sc = new Scanner(System.in);

        int n = sc.nextInt();

        if ((n / 100) * 111 >= n){
            System.out.println((n / 100 ) * 111);
        }else{
            System.out.println((n / 100 + 1) * 111);
        }

    }
} import java.lang.reflect.Array; Array java.lang.reflect import java.util.*; util.* java public class Main{
    public static void main(String[] args)throws Exception{
        Scanner sc = new Scanner(System.in);

        int n = sc.nextInt();

        if ((n / 100) * 111 >= n){
            System.out.println((n / 100 ) * 111);
        }else{
            System.out.println((n / 100 + 1) * 111);
        }

    }
} Main public static void main(String[] args)throws Exception{
        Scanner sc = new Scanner(System.in);

        int n = sc.nextInt();

        if ((n / 100) * 111 >= n){
            System.out.println((n / 100 ) * 111);
        }else{
            System.out.println((n / 100 + 1) * 111);
        }

    } main {
        Scanner sc = new Scanner(System.in);

        int n = sc.nextInt();

        if ((n / 100) * 111 >= n){
            System.out.println((n / 100 ) * 111);
        }else{
            System.out.println((n / 100 + 1) * 111);
        }

    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int n = sc.nextInt(); n sc.nextInt() sc.nextInt sc if ((n / 100) * 111 >= n){
            System.out.println((n / 100 ) * 111);
        }else{
            System.out.println((n / 100 + 1) * 111);
        } (n / 100) * 111 >= n (n / 100) * 111 (n / 100) n 100 111 n {
            System.out.println((n / 100 ) * 111);
        } System.out.println((n / 100 ) * 111) System.out.println System.out System System.out (n / 100 ) * 111 (n / 100 ) n 100 111 {
            System.out.println((n / 100 + 1) * 111);
        } System.out.println((n / 100 + 1) * 111) System.out.println System.out System System.out (n / 100 + 1) * 111 (n / 100 + 1) n / 100 n 100 1 111 String[] args args public class Main{
    public static void main(String[] args)throws Exception{
        Scanner sc = new Scanner(System.in);

        int n = sc.nextInt();

        if ((n / 100) * 111 >= n){
            System.out.println((n / 100 ) * 111);
        }else{
            System.out.println((n / 100 + 1) * 111);
        }

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

        int n = sc.nextInt();

        if ((n / 100) * 111 >= n){
            System.out.println((n / 100 ) * 111);
        }else{
            System.out.println((n / 100 + 1) * 111);
        }

    }
} Main
import java.lang.reflect.Array;
import java.util.*;
public class Main{
    public static void main(String[] args)throws Exception{
        Scanner sc = new Scanner(System.in);

        int n = sc.nextInt();

        if ((n / 100) * 111 >= n){
            System.out.println((n / 100 ) * 111);
        }else{
            System.out.println((n / 100 + 1) * 111);
        }

    }
}