ProgBasicsExam1and2December2018-E05projectPrize

import java.util.Scanner;

public class E05projectPrize {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        int projectPieces = Integer.parseInt(scanner.nextLine());

        double moneyPrizePerPiece = Double.parseDouble(scanner.nextLine());

        double sum = 0;
        int counter = 0;
        for (int i = 0; i < projectPieces; i++) {
            double pointsPerPiece = Double.parseDouble(scanner.nextLine());
            counter++;

            if(counter % 2 == 0 ){

                sum+=pointsPerPiece * 2;
            }
            else{
                sum+=pointsPerPiece;
            }

        }
        double totalPrize =sum*moneyPrizePerPiece;

        System.out.printf("The project prize was %.2f lv.", totalPrize);

    }
}