
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n, ans = 111;

		n = sc.nextInt();

		for (int i = 1; i < 10; ++i) {
			int tmp = i * 100 + i * 10 + i;
			if (n <= tmp) {
				ans = tmp;
				break;
			}
		}

		System.out.println(ans);
		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, ans = 111;

		n = sc.nextInt();

		for (int i = 1; i < 10; ++i) {
			int tmp = i * 100 + i * 10 + i;
			if (n <= tmp) {
				ans = tmp;
				break;
			}
		}

		System.out.println(ans);
		sc.close();
	}

} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n, ans = 111;

		n = sc.nextInt();

		for (int i = 1; i < 10; ++i) {
			int tmp = i * 100 + i * 10 + i;
			if (n <= tmp) {
				ans = tmp;
				break;
			}
		}

		System.out.println(ans);
		sc.close();
	} main {
		Scanner sc = new Scanner(System.in);
		int n, ans = 111;

		n = sc.nextInt();

		for (int i = 1; i < 10; ++i) {
			int tmp = i * 100 + i * 10 + i;
			if (n <= tmp) {
				ans = tmp;
				break;
			}
		}

		System.out.println(ans);
		sc.close();
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int n n ans = 111; ans 111 n = sc.nextInt() n sc.nextInt() sc.nextInt sc for (int i = 1; i < 10; ++i) {
			int tmp = i * 100 + i * 10 + i;
			if (n <= tmp) {
				ans = tmp;
				break;
			}
		} int i = 1; int i = 1; i 1 i < 10 i 10 ++i ++i i {
			int tmp = i * 100 + i * 10 + i;
			if (n <= tmp) {
				ans = tmp;
				break;
			}
		} {
			int tmp = i * 100 + i * 10 + i;
			if (n <= tmp) {
				ans = tmp;
				break;
			}
		} int tmp = i * 100 + i * 10 + i; tmp i * 100 + i * 10 + i i * 100 + i * 10 + i i * 100 i 100 i * 10 i 10 i if (n <= tmp) {
				ans = tmp;
				break;
			} n <= tmp n tmp {
				ans = tmp;
				break;
			} ans = tmp ans tmp break; System.out.println(ans) System.out.println System.out System System.out ans 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, ans = 111;

		n = sc.nextInt();

		for (int i = 1; i < 10; ++i) {
			int tmp = i * 100 + i * 10 + i;
			if (n <= tmp) {
				ans = tmp;
				break;
			}
		}

		System.out.println(ans);
		sc.close();
	}

} public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n, ans = 111;

		n = sc.nextInt();

		for (int i = 1; i < 10; ++i) {
			int tmp = i * 100 + i * 10 + i;
			if (n <= tmp) {
				ans = tmp;
				break;
			}
		}

		System.out.println(ans);
		sc.close();
	}

} Main

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n, ans = 111;

		n = sc.nextInt();

		for (int i = 1; i < 10; ++i) {
			int tmp = i * 100 + i * 10 + i;
			if (n <= tmp) {
				ans = tmp;
				break;
			}
		}

		System.out.println(ans);
		sc.close();
	}

}
