import java.util.Scanner;

public class Main {

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);

		int n = sc.nextInt();

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

	}
} import java.util.Scanner; Scanner java.util public class Main {

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);

		int n = sc.nextInt();

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

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

		Scanner sc = new Scanner(System.in);

		int n = sc.nextInt();

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

	} main {

		Scanner sc = new Scanner(System.in);

		int n = sc.nextInt();

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

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

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);

		int n = sc.nextInt();

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

	}
} public class Main {

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);

		int n = sc.nextInt();

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

	}
} Main
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);

		int n = sc.nextInt();

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

	}
}