02. Report System

import java.util.Scanner;

public class ReportSystem {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int neededSum = Integer.parseInt(scanner.nextLine()),
                cashSum = 0, cardSum = 0, cashCount = 0, cardCount = 0,
                counter = 0, sumTransaction;

        String input = "";
        while (neededSum > 0 && !(input = scanner.nextLine()).equals("End")) {
            sumTransaction = Integer.parseInt(input);

            if (counter % 2 == 0 && sumTransaction > 0 && sumTransaction <= 100) {
                System.out.println("Product sold!");
                neededSum -= sumTransaction;
                cashSum += sumTransaction;
                cashCount++;
            } else if (counter % 2 == 1 && sumTransaction >= 10) {
                System.out.println("Product sold!");
                neededSum -= sumTransaction;
                cardSum += sumTransaction;
                cardCount++;
            } else {
                System.out.println("Error in transaction!");
            }
            counter++;
        }

        if (input.equals("End")) {
            System.out.println("Failed to collect required money for charity.");
        } else {
            System.out.printf("Average CS: %.2f\nAverage CC: %.2f\n", 1.0 * cashSum / cashCount, 1.0 * cardSum / cardCount);
        }
    }
}