03. "Voina" - Number game

package Lekciq;

import java.util.Arrays;
import java.util.LinkedHashSet;
import java.util.Scanner;
import java.util.Set;
import java.util.stream.Collectors;

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



        Set<Integer> firstPlayerCards = Arrays.stream(scanner.nextLine().split("\\s+"))
                .map(Integer::parseInt)
                .collect(Collectors.toCollection(LinkedHashSet::new));

        Set<Integer> secondPlayerCards = Arrays.stream(scanner.nextLine().split("\\s+"))
                .map(Integer::parseInt)
                .collect(Collectors.toCollection(LinkedHashSet::new));

        int rounds = 50;

        while (rounds-- > 0) {

            int firstPlayerNumber = firstPlayerCards.iterator().next();
            firstPlayerCards.remove(firstPlayerNumber);

            int secondPlayerNumber = secondPlayerCards.iterator().next();
            secondPlayerCards.remove(secondPlayerNumber);

            if (firstPlayerNumber > secondPlayerNumber) {
                firstPlayerCards.add(firstPlayerNumber);
                firstPlayerCards.add(secondPlayerNumber);
            } else if (secondPlayerNumber > firstPlayerNumber){
                secondPlayerCards.add(firstPlayerNumber);
                secondPlayerCards.add(secondPlayerNumber);
            }
            if (firstPlayerCards.isEmpty() || secondPlayerCards.isEmpty()) {
                break;
            }
        }


        if (secondPlayerCards.size() > firstPlayerCards.size()) {
            System.out.println("Second player win!");
        } else if (firstPlayerCards.size() > secondPlayerCards.size()) {
            System.out.println("First player win!");
        } else {
            System.out.println("Draw!");
        }
    }
}