import java.util.*;
public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		System.out.println((int) Math.ceil(sc.nextInt() / 111.0) * 111);
	}
} import java.util.*; util.* java public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		System.out.println((int) Math.ceil(sc.nextInt() / 111.0) * 111);
	}
} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		System.out.println((int) Math.ceil(sc.nextInt() / 111.0) * 111);
	} main {
		Scanner sc = new Scanner(System.in);
		System.out.println((int) Math.ceil(sc.nextInt() / 111.0) * 111);
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) System.out.println((int) Math.ceil(sc.nextInt() / 111.0) * 111) System.out.println System.out System System.out (int) Math.ceil(sc.nextInt() / 111.0) * 111 (int) Math.ceil(sc.nextInt() / 111.0) Math.ceil Math sc.nextInt() / 111.0 sc.nextInt() sc.nextInt sc 111.0 111 String[] args args public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		System.out.println((int) Math.ceil(sc.nextInt() / 111.0) * 111);
	}
} public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		System.out.println((int) Math.ceil(sc.nextInt() / 111.0) * 111);
	}
} Main
import java.util.*;
public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		System.out.println((int) Math.ceil(sc.nextInt() / 111.0) * 111);
	}
}