import java.util.Scanner;

/**
 * switch实现石头/剪子/布并判断胜负
 */
public class Main {

	public static void main(String[] args) {
		System.out.println("please choice:");
		System.out.println(" 1: Rock");
		System.out.println(" 2: Scissors");
		System.out.println(" 3: Paper");
		Scanner scanner = new Scanner(System.in);
		// 用户输入:
		int choice = scanner.nextInt();
		// 计算机随机数 1, 2, 3:
		int random = 1 + (int) (Math.random() * 3);
		switch (choice) {
			case 1 -> System.out.println(random==1?"平局！":random==2?"你赢了！":"你输了！");
			case 2 -> System.out.println(random==2?"平局！":random==3?"你赢了！":"你输了！");
			case 3 -> System.out.println(random==3?"平局！":random==1?"你赢了！":"你输了！");
			default -> System.out.println("选择错误！");
			}
		}
		
}