import java.util.*;

public class Main{
  
  public static void main(String[] args){
    
    Scanner sc = new Scanner(System.in);
    
    String n = sc.next();
    int len = n.length();
    
    if(len==3){
      System.out.println(n);
    }else if(len==2){
      System.out.println("0"+n);
    }else{
      System.out.println("00"+n);
    }
    
  }

}