// Calculate the sum of the series 
// 1/1+1/2+1/3+...+1/n in rational numbers 

import java.io.*;
import rational;

class series {

  public static void main (String[] args) throws IOException {

     int n, i;
     BufferedReader stdin;
     stdin = new BufferedReader (new InputStreamReader (System.in));

     System.out.print ("Enter n: ");
     n = Integer.parseInt (stdin.readLine());

     rational s = new rational (1,1);  
     for (i=2; i<=n; i++) s = s.sum(new rational(1,i)); 
     s.reduce();
     System.out.println(s.str());
   }
}