Trojan Invasion

package com.company;

import java.util.ArrayDeque;
import java.util.Arrays;
import java.util.Deque;
import java.util.Scanner;
import java.util.stream.Collectors;

public class Main {

    public static void main(String[] args) {

        Scanner scan = new Scanner(System.in);
        int wavesCount = Integer.parseInt(scan.nextLine());
        Deque<Integer> spartansPlateQueue = new ArrayDeque<>();
        Arrays.stream(scan.nextLine().split("\\s+"))
                .map(Integer::parseInt)
                .forEach(spartansPlateQueue::offer);

        Deque<Integer> trojanWarriorsStack = new ArrayDeque<>();

        for (int i = 1; i <= wavesCount; i++) {

            if (!spartansPlateQueue.isEmpty()) {
                Arrays.stream(scan.nextLine().split("\\s+"))
                        .map(Integer::parseInt)
                        .forEach(trojanWarriorsStack::push);
            }else {
                break;
            }

            if (i % 3 == 0){
                spartansPlateQueue.addLast(Integer.parseInt(scan.nextLine()));
            }

            while (!spartansPlateQueue.isEmpty() && !trojanWarriorsStack.isEmpty()){

                int currentPlate = spartansPlateQueue.pop();
                int currentWarrior = trojanWarriorsStack.poll();

                if (currentPlate != currentWarrior){
                    if (currentWarrior > currentPlate){
                        currentWarrior -= currentPlate;
                        trojanWarriorsStack.push(currentWarrior);
                    }else {
                        currentPlate -= currentWarrior;
                        spartansPlateQueue.addFirst(currentPlate);
                    }
                }

            }
        }
        if (spartansPlateQueue.isEmpty()){
            System.out.println("The Trojans successfully destroyed the Spartan defense.");
            System.out.println("Warriors left: " + trojanWarriorsStack.stream()
                    .map(String::valueOf)
                    .collect(Collectors.joining(", ")));

        }else {
            System.out.println("The Spartans successfully repulsed the Trojan attack.");
            System.out.println("Plates left: " + spartansPlateQueue.stream()
                    .map(String::valueOf)
                    .collect(Collectors.joining(", ")));
        }

    }
}