using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Collections;
using System.IO;
namespace _15._42
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Dialog_Click(object sender, EventArgs e)
        {
            openFileDialog1.ShowDialog();
            way.Text = openFileDialog1.FileName;
        }

        private void button1_Click(object sender, EventArgs e)
        {
            Queue<Double> q1 = new Queue<Double>();
            StreamReader st = new StreamReader(way.Text);
            string[] arr = null;
            while (!st.EndOfStream)
            {
                string line = st.ReadLine();
                arr = line.Split('\n');
                for (int i = 0; i < arr.Length; i++)
                {
                    Double prover;
                    if (Double.TryParse(arr[i], out prover))
                        q1.Enqueue(prover);
                }
            }
            st.Close();

            int n = q1.Count;
            Double[] A = new Double[n];
            for (int i = 0; i < n; i++)
            {
                A[i] = q1.Dequeue();
            }
            Double s = 1;
            int j = n;
            for (int i = 0; i != n - 2; i++)
            {
                s = s * (A[i] + A[i + 1] + 2 * A[j]);
                j--;
            }
            result.Text += " " + Convert.ToString(s);
        }
    }
}