Coins

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace DomashnoCoins2
{
    class Program
    {
        static void Main(string[] args)
        {
            double changeSumLv = double.Parse(Console.ReadLine());

            double changeSumSt = changeSumLv * 100;

            double coinCounter = 0;

            while (true)
            {
                if (changeSumSt >= 200)
                {
                    double dvaLv = Math.Floor(changeSumSt / 200);
                    coinCounter += dvaLv;
                    changeSumSt -= dvaLv * 200;
                }
                else if (changeSumSt < 200 && changeSumSt >= 100)
                {
                    double edinLv = Math.Floor(changeSumSt / 100);
                    coinCounter += edinLv;
                    changeSumSt -= edinLv * 100;
                }
                else if (changeSumSt < 100 && changeSumSt >= 50)
                {
                    double polovinLv = Math.Floor(changeSumSt / 50);
                    coinCounter += polovinLv;
                    changeSumSt -= polovinLv * 50;
                }
                else if (changeSumSt < 50 && changeSumSt >= 20)
                {
                    double dvaisetSt = Math.Floor(changeSumSt / 20);
                    coinCounter += dvaisetSt;
                    changeSumSt -= dvaisetSt * 20;
                }
                else if (changeSumSt < 20 && changeSumSt >= 10)
                {
                    double desetSt = Math.Floor(changeSumSt / 10);
                    coinCounter += desetSt;
                    changeSumSt -= desetSt * 10;
                }
                else if (changeSumSt < 10 && changeSumSt >= 5)
                {
                    double petSt = Math.Floor(changeSumSt / 5);
                    coinCounter += petSt;
                    changeSumSt -= petSt * 5;
                }
                else if (changeSumSt < 5 && changeSumSt >= 2)
                {
                    double dveSt = Math.Floor(changeSumSt / 2);
                    coinCounter += dveSt;
                    changeSumSt -= dveSt * 2;
                }
                else if (changeSumSt < 2 && changeSumSt >0)
                {

                    coinCounter ++;
                    changeSumSt = 0;
                }
                else
                {
                    Console.WriteLine($"{coinCounter}");
                    break;
                }
            }
        }
    }
}