import java.util.Scanner;
import java.util.ArrayList;
import java.util.Collections;

public class Main {

  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    for (int i = 111; i <= 999; i += 111) {
      if (i >= N) {
        System.out.println(i);
        break;
      }
    }
  }
} import java.util.Scanner; Scanner java.util import java.util.ArrayList; ArrayList java.util import java.util.Collections; Collections java.util public class Main {

  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    for (int i = 111; i <= 999; i += 111) {
      if (i >= N) {
        System.out.println(i);
        break;
      }
    }
  }
} Main public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    for (int i = 111; i <= 999; i += 111) {
      if (i >= N) {
        System.out.println(i);
        break;
      }
    }
  } main {
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    for (int i = 111; i <= 999; i += 111) {
      if (i >= N) {
        System.out.println(i);
        break;
      }
    }
  } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int N = sc.nextInt(); N sc.nextInt() sc.nextInt sc for (int i = 111; i <= 999; i += 111) {
      if (i >= N) {
        System.out.println(i);
        break;
      }
    } int i = 111; int i = 111; i 111 i <= 999 i 999 i += 111 i += 111 i 111 {
      if (i >= N) {
        System.out.println(i);
        break;
      }
    } {
      if (i >= N) {
        System.out.println(i);
        break;
      }
    } if (i >= N) {
        System.out.println(i);
        break;
      } i >= N i N {
        System.out.println(i);
        break;
      } System.out.println(i) System.out.println System.out System System.out i break; String[] args args public class Main {

  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    for (int i = 111; i <= 999; i += 111) {
      if (i >= N) {
        System.out.println(i);
        break;
      }
    }
  }
} public class Main {

  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    for (int i = 111; i <= 999; i += 111) {
      if (i >= N) {
        System.out.println(i);
        break;
      }
    }
  }
} Main
import java.util.Scanner;
import java.util.ArrayList;
import java.util.Collections;

public class Main {

  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    for (int i = 111; i <= 999; i += 111) {
      if (i >= N) {
        System.out.println(i);
        break;
      }
    }
  }
}
