/* package whatever; // don't place package name! */

import java.util.*;
import java.lang.*;
import java.io.*;

/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
    public static void main (String[] args) throws java.lang.Exception
    {
        Scanner keyboard = new Scanner (System.in);
        System.out.println("Enter a positive integer and that number of odd integers will be totaled and displayed: ");
        int n;
        int sum = 0;
        n = keyboard.nextInt();
        for (int i = 1, j = 0; j < n; i += 2, j++)
            sum += i;
        System.out.print("The total is " + sum);
    }
}