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;

namespace kdamultipl
{
    public partial class Form1 : Form
    {
        double a;
        double b;
        double sum;

        public Form1()
        {
            InitializeComponent();

        }

        private void textBox1_TextChanged(object sender, EventArgs e)
        {
            a = Convert.ToInt32(Console.ReadLine());
        }

        private void textBox2_TextChanged(object sender, EventArgs e)
        {

            b = Convert.ToInt32(Console.ReadLine());
        }

        private void Form1_Load(object sender, EventArgs e)
        {



        }
        private void textBox3_TextChanged(object sender, EventArgs e)
        {

        }
        private void button1_Click(object sender, EventArgs e)
        {

            a = Double.Parse(textBox1.Text);
            b = Double.Parse(textBox2.Text);
            sum = (a + b) / 2;
            textBox3.Text = (sum).ToString();


        }

    }
}