import java.util.Scanner;
public class Payment
{
    public static void main(String[] nrCoins)
    {
        Scanner input = new Scanner(System.in);
        String coinsAvailable = nrCoins[0];
        double price,recieved;
        char c = coinsAvailable.charAt(0);
        int coin2,cashBack,centC, centD,centU;
        int someCoins=(c-'0');

        System.out.println("Maquina carregada com "+someCoins+" moedas de cada tipo");

        do{
            System.out.print("Preco(em euros)? ");
            price = input.nextDouble();
        }while(price!=0);
        while(){
            System.out.print("Quantia recebida(em euros)? ");
            recieved = input.nextDouble();
            int changeCents = ((int)recieved-price)*100;
            centC=changeCents/100;
            centD=(changeCents%100)/10;
            centU=(changeCents%100)%10
            for(int counterCoins2=someCoins;(centC>=4&&centC%2=0)||centC=2;--counterCoins2){
                ++coin2;
            }
            centC-=coin2;
            while(centC<2)


        }