import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc=new Scanner(System.in);
		int n=sc.nextInt();
		
		System.out.println((n%100 <= (n/100)*11)? (n/100)*111 : ((n/100)+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=sc.nextInt();
		
		System.out.println((n%100 <= (n/100)*11)? (n/100)*111 : ((n/100)+1)*111);
		
	}
} Main public static void main(String[] args) {
		Scanner sc=new Scanner(System.in);
		int n=sc.nextInt();
		
		System.out.println((n%100 <= (n/100)*11)? (n/100)*111 : ((n/100)+1)*111);
		
	} main {
		Scanner sc=new Scanner(System.in);
		int n=sc.nextInt();
		
		System.out.println((n%100 <= (n/100)*11)? (n/100)*111 : ((n/100)+1)*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((n%100 <= (n/100)*11)? (n/100)*111 : ((n/100)+1)*111) System.out.println System.out System System.out (n%100 <= (n/100)*11)? (n/100)*111 : ((n/100)+1)*111 (n%100 <= (n/100)*11) n%100 n 100 (n/100)*11 (n/100) n 100 11 (n/100)*111 (n/100) n 100 111 ((n/100)+1)*111 ((n/100)+1) (n/100) n 100 1 111 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((n%100 <= (n/100)*11)? (n/100)*111 : ((n/100)+1)*111);
		
	}
} public class Main {
	public static void main(String[] args) {
		Scanner sc=new Scanner(System.in);
		int n=sc.nextInt();
		
		System.out.println((n%100 <= (n/100)*11)? (n/100)*111 : ((n/100)+1)*111);
		
	}
} Main
import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc=new Scanner(System.in);
		int n=sc.nextInt();
		
		System.out.println((n%100 <= (n/100)*11)? (n/100)*111 : ((n/100)+1)*111);
		
	}
}
