using System;

// Odd Number 

public class Program

{

    public static void Main()

    {

        int sum=0;

        Console.WriteLine("Enter No:");

        int number=Convert.ToInt32(Console.ReadLine());

        for (int i=1; i<=number; i+=2)

        {

            sum+=i;

            Console.WriteLine("Odd no sum:"+ sum);

        }

    }

}