using System;

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine(ShowSequence(-15));

    }

​

    public static string ShowSequence(int n)

    {

        if (n == 0)

        {

            return n + "=";

        }

​

        if (n < 0)

        {

            return n + "<";

        }

​

        int sumInt = 0;

        string sum = "";

        for (int i = 0; i <= n; i++)

        {

            if (i == n)

            {

                sum += i + " = ";

            }

            else

            {

                sum += i + "+";

            }

​

            sumInt += i;

        }

​

        sum += sumInt;

        return sum;

    }

}