import java.util.Scanner;

public class Main {

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

		int ans = 0;
		if(N % 111 == 0) {
			ans = N;
		}else {
			ans = (N / 111 + 1) * 111;
		}

		System.out.println(ans);

	}

} 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();
		sc.close();

		int ans = 0;
		if(N % 111 == 0) {
			ans = N;
		}else {
			ans = (N / 111 + 1) * 111;
		}

		System.out.println(ans);

	}

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

		int ans = 0;
		if(N % 111 == 0) {
			ans = N;
		}else {
			ans = (N / 111 + 1) * 111;
		}

		System.out.println(ans);

	} main {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		sc.close();

		int ans = 0;
		if(N % 111 == 0) {
			ans = N;
		}else {
			ans = (N / 111 + 1) * 111;
		}

		System.out.println(ans);

	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int N = sc.nextInt(); N sc.nextInt() sc.nextInt sc sc.close() sc.close sc int ans = 0; ans 0 if(N % 111 == 0) {
			ans = N;
		}else {
			ans = (N / 111 + 1) * 111;
		} N % 111 == 0 N % 111 N 111 0 {
			ans = N;
		} ans = N ans N {
			ans = (N / 111 + 1) * 111;
		} ans = (N / 111 + 1) * 111 ans (N / 111 + 1) * 111 (N / 111 + 1) N / 111 N 111 1 111 System.out.println(ans) System.out.println System.out System System.out ans String[] args args public class Main {

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

		int ans = 0;
		if(N % 111 == 0) {
			ans = N;
		}else {
			ans = (N / 111 + 1) * 111;
		}

		System.out.println(ans);

	}

} public class Main {

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

		int ans = 0;
		if(N % 111 == 0) {
			ans = N;
		}else {
			ans = (N / 111 + 1) * 111;
		}

		System.out.println(ans);

	}

} Main
import java.util.Scanner;

public class Main {

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

		int ans = 0;
		if(N % 111 == 0) {
			ans = N;
		}else {
			ans = (N / 111 + 1) * 111;
		}

		System.out.println(ans);

	}

}
