import java.util.Scanner;
public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int m = n;
		int i = 0;
		while(true) {
			i++;
			if(m <= 111) {
				System.out.println(i*111);
				break;
			}
			m-=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();
		int m = n;
		int i = 0;
		while(true) {
			i++;
			if(m <= 111) {
				System.out.println(i*111);
				break;
			}
			m-=111;
		}
		sc.close();
	}

} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int m = n;
		int i = 0;
		while(true) {
			i++;
			if(m <= 111) {
				System.out.println(i*111);
				break;
			}
			m-=111;
		}
		sc.close();
	} main {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int m = n;
		int i = 0;
		while(true) {
			i++;
			if(m <= 111) {
				System.out.println(i*111);
				break;
			}
			m-=111;
		}
		sc.close();
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int n = sc.nextInt(); n sc.nextInt() sc.nextInt sc int m = n; m n int i = 0; i 0 while(true) {
			i++;
			if(m <= 111) {
				System.out.println(i*111);
				break;
			}
			m-=111;
		} true {
			i++;
			if(m <= 111) {
				System.out.println(i*111);
				break;
			}
			m-=111;
		} i++ i if(m <= 111) {
				System.out.println(i*111);
				break;
			} m <= 111 m 111 {
				System.out.println(i*111);
				break;
			} System.out.println(i*111) System.out.println System.out System System.out i*111 i 111 break; m-=111 m 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();
		int m = n;
		int i = 0;
		while(true) {
			i++;
			if(m <= 111) {
				System.out.println(i*111);
				break;
			}
			m-=111;
		}
		sc.close();
	}

} public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int m = n;
		int i = 0;
		while(true) {
			i++;
			if(m <= 111) {
				System.out.println(i*111);
				break;
			}
			m-=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();
		int m = n;
		int i = 0;
		while(true) {
			i++;
			if(m <= 111) {
				System.out.println(i*111);
				break;
			}
			m-=111;
		}
		sc.close();
	}

}
