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。
CF1977A.Little Nikita
Little Nikita
The little boy Nikita was given some cubes as a present. He decided to build a tower out of them.
Initially, the tower doesn't have any cubes. In one move, Nikita either puts exactly cube on top of the tower or removes exactly cube from the top of the tower. Is it possible that after moves, the resulting tower has exactly cubes?
Input
Each test contains multiple test cases. The first line of input contains a single integer () — the number of test cases. The description of the test cases follows.
The only line of each test case contains two integers and ().
Output
For each test case, output "Yes" (without quotes) if Nikita can obtain a tower with cubes, and "No" (without quotes) otherwise.
You can output each letter in any case (lowercase or uppercase). For example, the strings "yEs", "yes", "Yes", and "YES" will be accepted as a positive answer.
Note
In the first test case, Nikita can put cube on top of the tower times in a row, so the answer is "Yes".
In the second test case, Nikita can only end up with either a tower with no blocks or a tower with blocks, so the answer is "No".
Samples
3
3 3
2 4
5 3
Yes
No
Yes
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 |