import java.util.Scanner;

public class Main {

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

		    int n = sc.nextInt();
		    if(n % 111 == 0) {
		    	System.out.println(n);
		    }
		    else {
		    	System.out.println(n /111 * 111 + 111);
		    	
		    }
		    
		    sc.close(); }
} 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();
		    if(n % 111 == 0) {
		    	System.out.println(n);
		    }
		    else {
		    	System.out.println(n /111 * 111 + 111);
		    	
		    }
		    
		    sc.close(); }
} Main public static void main(String args[]) {
		    Scanner sc = new Scanner(System.in);

		    int n = sc.nextInt();
		    if(n % 111 == 0) {
		    	System.out.println(n);
		    }
		    else {
		    	System.out.println(n /111 * 111 + 111);
		    	
		    }
		    
		    sc.close(); } main {
		    Scanner sc = new Scanner(System.in);

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

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

		    int n = sc.nextInt();
		    if(n % 111 == 0) {
		    	System.out.println(n);
		    }
		    else {
		    	System.out.println(n /111 * 111 + 111);
		    	
		    }
		    
		    sc.close(); }
} public class Main {

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

		    int n = sc.nextInt();
		    if(n % 111 == 0) {
		    	System.out.println(n);
		    }
		    else {
		    	System.out.println(n /111 * 111 + 111);
		    	
		    }
		    
		    sc.close(); }
} Main
import java.util.Scanner;

public class Main {

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

		    int n = sc.nextInt();
		    if(n % 111 == 0) {
		    	System.out.println(n);
		    }
		    else {
		    	System.out.println(n /111 * 111 + 111);
		    	
		    }
		    
		    sc.close(); }
}
