// Calculo de Tarifa Telefonica SIN COMENTAR

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

namespace TarifaTelefonica {

	class Program{

		static void Main (string [] args){

			int cantKv;
			double total, costoKv;
			costoKv = 0;

			string linea;

			System.Console.WriteLine("Cantidad de kilovatios consumidos: ");
			linea = Console.ReadLine();
			cantKv = int.Parse(linea);

			if(cantKv <= 1000){
				costoKv = 0.14;
			}

			if(cantKv > 1000){
				costoKv = 0.12;
			}

			if(cantKv > 1800){
				costoKv = 0.8;
			}

			total = cantKv * costoKv;

			System.Console.WriteLine("El total a pagar es: " + total);
		}
	}
}