import java.io.*;
import java.util.*;


public class Main {

	private static Scanner sc;
	private static Printer pr;

	private static void solve() {
		int n = sc.nextInt();

		for (int i = 1; i < 10; i++) {
			int tmp = i * 111;
			
			if (tmp >= n) {
				pr.println(tmp);
				break;
			}
		}
	}

	// ---------------------------------------------------
	public static void main(String[] args) {
		sc = new Scanner(INPUT == null ? System.in : new ByteArrayInputStream(INPUT.getBytes()));
		pr = new Printer(System.out);

		solve();

//		pr.close();
		pr.flush();
//		sc.close();
	}

	static String INPUT = null;

	private static class Printer extends PrintWriter {
		Printer(OutputStream out) {
			super(out);
		}
	}
} import java.io.*; io.* java import java.util.*; util.* java public class Main {

	private static Scanner sc;
	private static Printer pr;

	private static void solve() {
		int n = sc.nextInt();

		for (int i = 1; i < 10; i++) {
			int tmp = i * 111;
			
			if (tmp >= n) {
				pr.println(tmp);
				break;
			}
		}
	}

	// ---------------------------------------------------
	public static void main(String[] args) {
		sc = new Scanner(INPUT == null ? System.in : new ByteArrayInputStream(INPUT.getBytes()));
		pr = new Printer(System.out);

		solve();

//		pr.close();
		pr.flush();
//		sc.close();
	}

	static String INPUT = null;

	private static class Printer extends PrintWriter {
		Printer(OutputStream out) {
			super(out);
		}
	}
} Main private static Scanner sc; sc private static Printer pr; pr static String INPUT = null; INPUT null private static void solve() {
		int n = sc.nextInt();

		for (int i = 1; i < 10; i++) {
			int tmp = i * 111;
			
			if (tmp >= n) {
				pr.println(tmp);
				break;
			}
		}
	} solve {
		int n = sc.nextInt();

		for (int i = 1; i < 10; i++) {
			int tmp = i * 111;
			
			if (tmp >= n) {
				pr.println(tmp);
				break;
			}
		}
	} int n = sc.nextInt(); n sc.nextInt() sc.nextInt sc for (int i = 1; i < 10; i++) {
			int tmp = i * 111;
			
			if (tmp >= n) {
				pr.println(tmp);
				break;
			}
		} int i = 1; int i = 1; i 1 i < 10 i 10 i++ i++ i {
			int tmp = i * 111;
			
			if (tmp >= n) {
				pr.println(tmp);
				break;
			}
		} {
			int tmp = i * 111;
			
			if (tmp >= n) {
				pr.println(tmp);
				break;
			}
		} int tmp = i * 111; tmp i * 111 i 111 if (tmp >= n) {
				pr.println(tmp);
				break;
			} tmp >= n tmp n {
				pr.println(tmp);
				break;
			} pr.println(tmp) pr.println pr tmp break; // ---------------------------------------------------
	public static void main(String[] args) {
		sc = new Scanner(INPUT == null ? System.in : new ByteArrayInputStream(INPUT.getBytes()));
		pr = new Printer(System.out);

		solve();

//		pr.close();
		pr.flush();
//		sc.close();
	} main {
		sc = new Scanner(INPUT == null ? System.in : new ByteArrayInputStream(INPUT.getBytes()));
		pr = new Printer(System.out);

		solve();

//		pr.close();
		pr.flush();
//		sc.close();
	} sc = new Scanner(INPUT == null ? System.in : new ByteArrayInputStream(INPUT.getBytes())) sc new Scanner(INPUT == null ? System.in : new ByteArrayInputStream(INPUT.getBytes())) pr = new Printer(System.out) pr new Printer(System.out) solve() solve pr.flush() pr.flush pr String[] args args private static class Printer extends PrintWriter {
		Printer(OutputStream out) {
			super(out);
		}
	} Printer Printer(OutputStream out) {
			super(out);
		} Printer {
			super(out);
		} super(out) super out OutputStream out out PrintWriter public class Main {

	private static Scanner sc;
	private static Printer pr;

	private static void solve() {
		int n = sc.nextInt();

		for (int i = 1; i < 10; i++) {
			int tmp = i * 111;
			
			if (tmp >= n) {
				pr.println(tmp);
				break;
			}
		}
	}

	// ---------------------------------------------------
	public static void main(String[] args) {
		sc = new Scanner(INPUT == null ? System.in : new ByteArrayInputStream(INPUT.getBytes()));
		pr = new Printer(System.out);

		solve();

//		pr.close();
		pr.flush();
//		sc.close();
	}

	static String INPUT = null;

	private static class Printer extends PrintWriter {
		Printer(OutputStream out) {
			super(out);
		}
	}
} public class Main {

	private static Scanner sc;
	private static Printer pr;

	private static void solve() {
		int n = sc.nextInt();

		for (int i = 1; i < 10; i++) {
			int tmp = i * 111;
			
			if (tmp >= n) {
				pr.println(tmp);
				break;
			}
		}
	}

	// ---------------------------------------------------
	public static void main(String[] args) {
		sc = new Scanner(INPUT == null ? System.in : new ByteArrayInputStream(INPUT.getBytes()));
		pr = new Printer(System.out);

		solve();

//		pr.close();
		pr.flush();
//		sc.close();
	}

	static String INPUT = null;

	private static class Printer extends PrintWriter {
		Printer(OutputStream out) {
			super(out);
		}
	}
} Main
import java.io.*;
import java.util.*;


public class Main {

	private static Scanner sc;
	private static Printer pr;

	private static void solve() {
		int n = sc.nextInt();

		for (int i = 1; i < 10; i++) {
			int tmp = i * 111;
			
			if (tmp >= n) {
				pr.println(tmp);
				break;
			}
		}
	}

	// ---------------------------------------------------
	public static void main(String[] args) {
		sc = new Scanner(INPUT == null ? System.in : new ByteArrayInputStream(INPUT.getBytes()));
		pr = new Printer(System.out);

		solve();

//		pr.close();
		pr.flush();
//		sc.close();
	}

	static String INPUT = null;

	private static class Printer extends PrintWriter {
		Printer(OutputStream out) {
			super(out);
		}
	}
}
