import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = Integer.parseInt(sc.next());

		System.out.println(((N-1)/111+1)*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 = Integer.parseInt(sc.next());

		System.out.println(((N-1)/111+1)*111);
	}
} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = Integer.parseInt(sc.next());

		System.out.println(((N-1)/111+1)*111);
	} main {
		Scanner sc = new Scanner(System.in);
		int N = Integer.parseInt(sc.next());

		System.out.println(((N-1)/111+1)*111);
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int N = Integer.parseInt(sc.next()); N Integer.parseInt(sc.next()) Integer.parseInt Integer sc.next() sc.next sc System.out.println(((N-1)/111+1)*111) System.out.println System.out System System.out ((N-1)/111+1)*111 ((N-1)/111+1) (N-1)/111 (N-1) N 1 111 1 111 String[] args args public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = Integer.parseInt(sc.next());

		System.out.println(((N-1)/111+1)*111);
	}
} public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = Integer.parseInt(sc.next());

		System.out.println(((N-1)/111+1)*111);
	}
} Main
import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = Integer.parseInt(sc.next());

		System.out.println(((N-1)/111+1)*111);
	}
}
