import java.util.Scanner;
public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int num = N / 111;
		if (N % 111 != 0) {
			num++;
		}
		System.out.println(num * 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();
		int num = N / 111;
		if (N % 111 != 0) {
			num++;
		}
		System.out.println(num * 111);
	}
} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int num = N / 111;
		if (N % 111 != 0) {
			num++;
		}
		System.out.println(num * 111);
	} main {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int num = N / 111;
		if (N % 111 != 0) {
			num++;
		}
		System.out.println(num * 111);
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int N = sc.nextInt(); N sc.nextInt() sc.nextInt sc int num = N / 111; num N / 111 N 111 if (N % 111 != 0) {
			num++;
		} N % 111 != 0 N % 111 N 111 0 {
			num++;
		} num++ num System.out.println(num * 111) System.out.println System.out System System.out num * 111 num 111 String[] args args public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int num = N / 111;
		if (N % 111 != 0) {
			num++;
		}
		System.out.println(num * 111);
	}
} public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int num = N / 111;
		if (N % 111 != 0) {
			num++;
		}
		System.out.println(num * 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();
		int num = N / 111;
		if (N % 111 != 0) {
			num++;
		}
		System.out.println(num * 111);
	}
}
