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 WindowsFormsApp3 {
    public partial class Form1 : Form {
        public Form1() {
            InitializeComponent();
            textBox1.TextChanged += textBox1_TextChanged;
        }

        private void textBox1_TextChanged(object sender, EventArgs ee) {
            string res;
            string[] ed = new string[10] { " ","один", "два", "три", "четыре", "пять", "шесть", "семь", "восемь", "девять" };
            string[] des = new string[10] { " ","десять","двадцать","тридцать","сорок","пятьдесят","шестьдесят","семьдесят","восемьдесят","девяносто" };
            string[] sot = new string[10] { " ", "сто", "двести", "триста", "четыреста", "пятьсот", "шестьсот", "семьсот", "восемьсот", "девятьсот" };
            string[] iskl = new string[10] { " ", "одинадцать","двенадцать","тринадцать","четырнадцать","пятнадцать","шестнадцать","семнадцать","восемьнадцать","девятнадцать" };
            int x;
            if ((int.TryParse(textBox1.Text, out x)) && (x >= 0) && (x <= 1000))
            {
                if (x == 1000) res = "тысяча";
                else if (x == 0) res = "ноль";
                else {
                int s = x / 100; x= x % 100; res = sot[s];
                int d = x / 10; int e = x % 10;
                    if ((d == 1) && (e != 0))  res = res + " " + iskl[e];
                        else res = res + " " + des[d] + " " + ed[e];
                }
                label1.Text = res;
            }
            else label1.Text="";

        }
    }
}