题解 | 斗兽棋

import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Map<String, String> map = new HashMap<>();
        map.put("elephant", "tiger");
        map.put("tiger", "cat");
        map.put("cat", "mouse");
        map.put("mouse", "elephant");
        Scanner in = new Scanner(System.in);
        String s = in.nextLine();
        String[] strarr = s.split(" ");
        if (strarr.length != 2) {
            System.out.println("Invalid input");
            return;
        }
        String player1 = strarr[0];
        String player2 = strarr[1];
        if (!map.containsKey(player1) || !map.containsKey(player2)) {
            System.out.println("Invalid input");
        } else if(player1.equals(player2)) {
            System.out.println("tie");
        }else if(map.get(player1).equals(player2)) {
            System.out.println("win");
        }else if(map.get(player2).equals(player1)) {
            System.out.println("lose");
        }else{
            System.out.println("tie");
        }
    }
}