欢迎来到起遇信息学
起遇信息学正处于上线筹建阶段,以下功能已全部开放免费体验: ✅ 完整题库浏览与代码提交评测(C / C++ / Python / Java 等) ✅ 入门到进阶的系列课程试读、作业与考试 ✅ AI 提示、AI 作业分析等智能助教功能 ✅ 赛事模拟与个人能力报告 ✅ 邮箱注册开放 ⏳ 付费课程订阅与微信/支付宝支付通道 ⏳ 手机号登录,微信扫码登录、微信公众号绑定 使用中如遇任何问题,欢迎通过页面底部 **"联系我们"** 与我们沟通。
CF2123A.Blackboard Game
Blackboard Game
Initially, the integers from to are written on a blackboard.
In one round,
- Alice chooses an integer on the blackboard and erases it;
- then Bob chooses an integer on the blackboard such that and erases it.
Rounds take place in succession until a player is unable to make a move — the first player who is unable to make a move loses. Determine who wins with optimal play.
We define that whenever is an integer multiple of .
Input
The first line contains an integer () — the number of test cases.
The only line of each test case contains an integer () — the number of integers written on the blackboard.
Output
For each test case, output on a single line "Alice" if Alice wins with optimal play, and "Bob" if Bob wins with optimal play.
You can output the answer in any case (upper or lower). For example, the strings "aLiCe", "alice", "ALICE", and "alICE" will be recognized as "Alice".
Note
In the first sample, suppose Alice chooses , then Bob cannot choose any number so Alice wins immediately.
In the second sample, suppose Alice chooses , then Bob can choose . Then suppose Alice chooses , then Bob can choose . Then Alice has no numbers remaining, so Bob wins.
Samples
5
2
4
5
7
100
Alice
Bob
Alice
Alice
Bob
在线编程 IDE
建议全屏模式获得最佳体验
| 进入全屏编程 | Alt+E |
| 递交评测 | Ctrl+Enter |
| 注释/取消注释 | Ctrl+/ |
| 缩放字体 | Ctrl+滚轮 |