RapidCourier

import java.util.ArrayDeque;
import java.util.Scanner;

public class RapidCourier {

    public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);

        String[] input = scanner.nextLine().split(" ");
        String[] courier = scanner.nextLine().split(" ");

        ArrayDeque<Integer> packages = new ArrayDeque<>();
        ArrayDeque<Integer> couriers = new ArrayDeque<>();

        for (String w : input) {
            packages.add(Integer.parseInt(w));
        }

        for (String c : courier) {
            couriers.add(Integer.parseInt(c));
        }

        int total = 0;

        while (!packages.isEmpty() && !couriers.isEmpty()){
            int weight = packages.peek();
            int capacity = couriers.peek();

            if (capacity >= weight){
                int newCapacity = capacity - weight; // коригирано capacity - weight
                total += weight;
                packages.poll();

                if (newCapacity > 0){
                   couriers.add(couriers.poll() - weight); // коригирано couriers.poll() - weight
                } else {
                    couriers.poll();
                }
            } else {
                int remaining = weight - capacity;

                packages.poll();
                couriers.poll();

                total += capacity;

                packages.addFirst(remaining);
            }
        }

        System.out.printf("Total weight: %d kg\n", total);

        if (packages.isEmpty()) {
            System.out.println("Congratulations, all packages were delivered successfully by the couriers today.");
        } else if (couriers.isEmpty()) {
            System.out.print("Unfortunately, there are no more available couriers to deliver the following packages: ");
            StringBuilder remainingPackages = new StringBuilder();

            while (!packages.isEmpty()) {
                remainingPackages.append(packages.poll());
                if (!packages.isEmpty()) {
                    remainingPackages.append(", ");
                }
            }
            System.out.println(remainingPackages);
        } else {
            System.out.println("Couriers are still on duty: " + couriers.toString() + " but there are no more packages to deliver.");
        }
    }
}