import java.util.Scanner;

public class Test12 {
  public static void main(String[] args){
    // Your code here!
    Scanner sc=new Scanner(System.in);
    String result="";
    String line;
    line=sc.nextLine();
    result+=316+52*(Long.parseLong(line)-1);
    sc.close();
    System.out.println(result);
  }
}