import java.util.*;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		sc.close();
		System.out.println((((n - 1) / 111) + 1) * 111);
	}
} import java.util.*; util.* java public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		sc.close();
		System.out.println((((n - 1) / 111) + 1) * 111);
	}
} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		sc.close();
		System.out.println((((n - 1) / 111) + 1) * 111);
	} main {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		sc.close();
		System.out.println((((n - 1) / 111) + 1) * 111);
	} 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 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 = sc.nextInt();
		sc.close();
		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 = sc.nextInt();
		sc.close();
		System.out.println((((n - 1) / 111) + 1) * 111);
	}
} Main
import java.util.*;

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