import java.util.*;

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

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