import java.util.Scanner;

public class Main{
public static void main(String[] args){
  Scanner sc = new Scanner(System.in);
int  i = sc.nextInt();

int n = i/100*111;
if(n>=i){
  System.out.println(n);
}else{
  System.out.println(n+111);
}



}
} import java.util.Scanner; Scanner java.util public class Main{
public static void main(String[] args){
  Scanner sc = new Scanner(System.in);
int  i = sc.nextInt();

int n = i/100*111;
if(n>=i){
  System.out.println(n);
}else{
  System.out.println(n+111);
}



}
} Main public static void main(String[] args){
  Scanner sc = new Scanner(System.in);
int  i = sc.nextInt();

int n = i/100*111;
if(n>=i){
  System.out.println(n);
}else{
  System.out.println(n+111);
}



} main {
  Scanner sc = new Scanner(System.in);
int  i = sc.nextInt();

int n = i/100*111;
if(n>=i){
  System.out.println(n);
}else{
  System.out.println(n+111);
}



} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int  i = sc.nextInt(); i sc.nextInt() sc.nextInt sc int n = i/100*111; n i/100*111 i/100 i 100 111 if(n>=i){
  System.out.println(n);
}else{
  System.out.println(n+111);
} n>=i n i {
  System.out.println(n);
} System.out.println(n) System.out.println System.out System System.out n {
  System.out.println(n+111);
} System.out.println(n+111) System.out.println System.out System System.out n+111 n 111 String[] args args public class Main{
public static void main(String[] args){
  Scanner sc = new Scanner(System.in);
int  i = sc.nextInt();

int n = i/100*111;
if(n>=i){
  System.out.println(n);
}else{
  System.out.println(n+111);
}



}
} public class Main{
public static void main(String[] args){
  Scanner sc = new Scanner(System.in);
int  i = sc.nextInt();

int n = i/100*111;
if(n>=i){
  System.out.println(n);
}else{
  System.out.println(n+111);
}



}
} Main
import java.util.Scanner;

public class Main{
public static void main(String[] args){
  Scanner sc = new Scanner(System.in);
int  i = sc.nextInt();

int n = i/100*111;
if(n>=i){
  System.out.println(n);
}else{
  System.out.println(n+111);
}



}
}
