import java.io.InputStream;
import java.io.PrintStream;
import java.util.Scanner;

public class Main {
	InputStream in = System.in;
	PrintStream out = System.out;

	public void _main(String[] args) {
		Scanner sc = new Scanner(in);

		int N = sc.nextInt();

		out.println(((N / 111) + (Math.min(N % 111, 1))) * 111);

		sc.close();

	}

	public static void main(String[] args) {
		new Main()._main(args);
	}

} import java.io.InputStream; InputStream java.io import java.io.PrintStream; PrintStream java.io import java.util.Scanner; Scanner java.util public class Main {
	InputStream in = System.in;
	PrintStream out = System.out;

	public void _main(String[] args) {
		Scanner sc = new Scanner(in);

		int N = sc.nextInt();

		out.println(((N / 111) + (Math.min(N % 111, 1))) * 111);

		sc.close();

	}

	public static void main(String[] args) {
		new Main()._main(args);
	}

} Main InputStream in = System.in; in System.in System System.in PrintStream out = System.out; out System.out System System.out public void _main(String[] args) {
		Scanner sc = new Scanner(in);

		int N = sc.nextInt();

		out.println(((N / 111) + (Math.min(N % 111, 1))) * 111);

		sc.close();

	} _main {
		Scanner sc = new Scanner(in);

		int N = sc.nextInt();

		out.println(((N / 111) + (Math.min(N % 111, 1))) * 111);

		sc.close();

	} Scanner sc = new Scanner(in); sc new Scanner(in) int N = sc.nextInt(); N sc.nextInt() sc.nextInt sc out.println(((N / 111) + (Math.min(N % 111, 1))) * 111) out.println out ((N / 111) + (Math.min(N % 111, 1))) * 111 ((N / 111) + (Math.min(N % 111, 1))) (N / 111) N 111 (Math.min(N % 111, 1)) Math.min Math N % 111 N 111 1 111 sc.close() sc.close sc String[] args args public static void main(String[] args) {
		new Main()._main(args);
	} main {
		new Main()._main(args);
	} new Main()._main(args) new Main()._main new Main() args String[] args args public class Main {
	InputStream in = System.in;
	PrintStream out = System.out;

	public void _main(String[] args) {
		Scanner sc = new Scanner(in);

		int N = sc.nextInt();

		out.println(((N / 111) + (Math.min(N % 111, 1))) * 111);

		sc.close();

	}

	public static void main(String[] args) {
		new Main()._main(args);
	}

} public class Main {
	InputStream in = System.in;
	PrintStream out = System.out;

	public void _main(String[] args) {
		Scanner sc = new Scanner(in);

		int N = sc.nextInt();

		out.println(((N / 111) + (Math.min(N % 111, 1))) * 111);

		sc.close();

	}

	public static void main(String[] args) {
		new Main()._main(args);
	}

} Main
import java.io.InputStream;
import java.io.PrintStream;
import java.util.Scanner;

public class Main {
	InputStream in = System.in;
	PrintStream out = System.out;

	public void _main(String[] args) {
		Scanner sc = new Scanner(in);

		int N = sc.nextInt();

		out.println(((N / 111) + (Math.min(N % 111, 1))) * 111);

		sc.close();

	}

	public static void main(String[] args) {
		new Main()._main(args);
	}

}
