import java.util.*;
public class Main{
public static void main(String[] args){
Scanner sc = new Scanner(System.in);
  int n = sc.nextInt();
  if(n <= 111)System.out.println("111");
  else if(n <= 222)System.out.println("222");
  else if(n <= 333)System.out.println("333");
  else if(n <= 444)System.out.println("444");
  else if(n <= 555)System.out.println("555");
  else if(n <= 666)System.out.println("666");
  else if(n <= 777)System.out.println("777");
  else if(n <= 888)System.out.println("888");
  else if(n <= 999)System.out.println("999");
}} import java.util.*; util.* java public class Main{
public static void main(String[] args){
Scanner sc = new Scanner(System.in);
  int n = sc.nextInt();
  if(n <= 111)System.out.println("111");
  else if(n <= 222)System.out.println("222");
  else if(n <= 333)System.out.println("333");
  else if(n <= 444)System.out.println("444");
  else if(n <= 555)System.out.println("555");
  else if(n <= 666)System.out.println("666");
  else if(n <= 777)System.out.println("777");
  else if(n <= 888)System.out.println("888");
  else if(n <= 999)System.out.println("999");
}} Main public static void main(String[] args){
Scanner sc = new Scanner(System.in);
  int n = sc.nextInt();
  if(n <= 111)System.out.println("111");
  else if(n <= 222)System.out.println("222");
  else if(n <= 333)System.out.println("333");
  else if(n <= 444)System.out.println("444");
  else if(n <= 555)System.out.println("555");
  else if(n <= 666)System.out.println("666");
  else if(n <= 777)System.out.println("777");
  else if(n <= 888)System.out.println("888");
  else if(n <= 999)System.out.println("999");
} main {
Scanner sc = new Scanner(System.in);
  int n = sc.nextInt();
  if(n <= 111)System.out.println("111");
  else if(n <= 222)System.out.println("222");
  else if(n <= 333)System.out.println("333");
  else if(n <= 444)System.out.println("444");
  else if(n <= 555)System.out.println("555");
  else if(n <= 666)System.out.println("666");
  else if(n <= 777)System.out.println("777");
  else if(n <= 888)System.out.println("888");
  else if(n <= 999)System.out.println("999");
} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int n = sc.nextInt(); n sc.nextInt() sc.nextInt sc if(n <= 111)System.out.println("111");
  else if(n <= 222)System.out.println("222");
  else if(n <= 333)System.out.println("333");
  else if(n <= 444)System.out.println("444");
  else if(n <= 555)System.out.println("555");
  else if(n <= 666)System.out.println("666");
  else if(n <= 777)System.out.println("777");
  else if(n <= 888)System.out.println("888");
  else if(n <= 999)System.out.println("999"); n <= 111 n 111 System.out.println("111") System.out.println System.out System System.out "111" if(n <= 222)System.out.println("222");
  else if(n <= 333)System.out.println("333");
  else if(n <= 444)System.out.println("444");
  else if(n <= 555)System.out.println("555");
  else if(n <= 666)System.out.println("666");
  else if(n <= 777)System.out.println("777");
  else if(n <= 888)System.out.println("888");
  else if(n <= 999)System.out.println("999"); n <= 222 n 222 System.out.println("222") System.out.println System.out System System.out "222" if(n <= 333)System.out.println("333");
  else if(n <= 444)System.out.println("444");
  else if(n <= 555)System.out.println("555");
  else if(n <= 666)System.out.println("666");
  else if(n <= 777)System.out.println("777");
  else if(n <= 888)System.out.println("888");
  else if(n <= 999)System.out.println("999"); n <= 333 n 333 System.out.println("333") System.out.println System.out System System.out "333" if(n <= 444)System.out.println("444");
  else if(n <= 555)System.out.println("555");
  else if(n <= 666)System.out.println("666");
  else if(n <= 777)System.out.println("777");
  else if(n <= 888)System.out.println("888");
  else if(n <= 999)System.out.println("999"); n <= 444 n 444 System.out.println("444") System.out.println System.out System System.out "444" if(n <= 555)System.out.println("555");
  else if(n <= 666)System.out.println("666");
  else if(n <= 777)System.out.println("777");
  else if(n <= 888)System.out.println("888");
  else if(n <= 999)System.out.println("999"); n <= 555 n 555 System.out.println("555") System.out.println System.out System System.out "555" if(n <= 666)System.out.println("666");
  else if(n <= 777)System.out.println("777");
  else if(n <= 888)System.out.println("888");
  else if(n <= 999)System.out.println("999"); n <= 666 n 666 System.out.println("666") System.out.println System.out System System.out "666" if(n <= 777)System.out.println("777");
  else if(n <= 888)System.out.println("888");
  else if(n <= 999)System.out.println("999"); n <= 777 n 777 System.out.println("777") System.out.println System.out System System.out "777" if(n <= 888)System.out.println("888");
  else if(n <= 999)System.out.println("999"); n <= 888 n 888 System.out.println("888") System.out.println System.out System System.out "888" if(n <= 999)System.out.println("999"); n <= 999 n 999 System.out.println("999") System.out.println System.out System System.out "999" String[] args args public class Main{
public static void main(String[] args){
Scanner sc = new Scanner(System.in);
  int n = sc.nextInt();
  if(n <= 111)System.out.println("111");
  else if(n <= 222)System.out.println("222");
  else if(n <= 333)System.out.println("333");
  else if(n <= 444)System.out.println("444");
  else if(n <= 555)System.out.println("555");
  else if(n <= 666)System.out.println("666");
  else if(n <= 777)System.out.println("777");
  else if(n <= 888)System.out.println("888");
  else if(n <= 999)System.out.println("999");
}} public class Main{
public static void main(String[] args){
Scanner sc = new Scanner(System.in);
  int n = sc.nextInt();
  if(n <= 111)System.out.println("111");
  else if(n <= 222)System.out.println("222");
  else if(n <= 333)System.out.println("333");
  else if(n <= 444)System.out.println("444");
  else if(n <= 555)System.out.println("555");
  else if(n <= 666)System.out.println("666");
  else if(n <= 777)System.out.println("777");
  else if(n <= 888)System.out.println("888");
  else if(n <= 999)System.out.println("999");
}} Main
import java.util.*;
public class Main{
public static void main(String[] args){
Scanner sc = new Scanner(System.in);
  int n = sc.nextInt();
  if(n <= 111)System.out.println("111");
  else if(n <= 222)System.out.println("222");
  else if(n <= 333)System.out.println("333");
  else if(n <= 444)System.out.println("444");
  else if(n <= 555)System.out.println("555");
  else if(n <= 666)System.out.println("666");
  else if(n <= 777)System.out.println("777");
  else if(n <= 888)System.out.println("888");
  else if(n <= 999)System.out.println("999");
}}
