import java.util.*;
 
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		System.out.println(111 * ((n + 110) / 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();
		System.out.println(111 * ((n + 110) / 111));
	}
} Main public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		System.out.println(111 * ((n + 110) / 111));
	} main {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		System.out.println(111 * ((n + 110) / 111));
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int n = sc.nextInt(); n sc.nextInt() sc.nextInt sc System.out.println(111 * ((n + 110) / 111)) System.out.println System.out System System.out 111 * ((n + 110) / 111) 111 ((n + 110) / 111) (n + 110) n 110 111 String[] args args public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		System.out.println(111 * ((n + 110) / 111));
	}
} public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		System.out.println(111 * ((n + 110) / 111));
	}
} Main
import java.util.*;
 
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		System.out.println(111 * ((n + 110) / 111));
	}
}
