using System;

​

public class Program 

{

    public static int InputInt(string prompt)

    {

        Console.Write("Enter " + prompt + ": ");

        return Convert.ToInt32(Console.ReadLine());

    }

    public static void Main (string[] args) 

    {

        int x = InputInt("x");

        int sum = 1;

        // invariant: sum = (x^n)+c_1*(x^(n-1))+...+c_{n-j}*(x^(n-j))+...+c_n*(x^0) for coefficients entered so far

        int c = InputInt("c");

        while (c != 0)

        {

            sum = sum * x + c;

            c = InputInt("c");

        }

        Console.WriteLine("Result is: " + sum);

    }

}