using System;

public class Program

{

    public static void Main()

    {

        Console.Write("Input value of N: ");

            int N = int.Parse(Console.ReadLine());

            int sum = 1;

            for(int i = 1; i < N;)

            {

                ++i;

                Console.WriteLine("{0} + {1} = {2}",sum,i,sum+=i);

            }

    }

}