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。
CF1167A.Telephone Number
Telephone Number
A telephone number is a sequence of exactly 11 digits, where the first digit is 8. For example, the sequence 80011223388 is a telephone number, but the sequences 70011223388 and 80000011223388 are not.
You are given a string of length , consisting of digits.
In one operation you can delete any character from string . For example, it is possible to obtain strings 112, 111 or 121 from string 1121.
You need to determine whether there is such a sequence of operations (possibly empty), after which the string becomes a telephone number.
Input
The first line contains one integer () — the number of test cases.
The first line of each test case contains one integer () — the length of string .
The second line of each test case contains the string () consisting of digits.
Output
For each test print one line.
If there is a sequence of operations, after which becomes a telephone number, print YES.
Otherwise, print NO.
Note
In the first test case you need to delete the first and the third digits. Then the string 7818005553535 becomes 88005553535.
Samples
2
13
7818005553535
11
31415926535
YES
NO
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 |