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。
CF1999D.Slavic's Exam
Slavic's Exam
Slavic has a very tough exam and needs your help in order to pass it. Here is the question he is struggling with:
There exists a string , which consists of lowercase English letters and possibly zero or more "?".
Slavic is asked to change each "?" to a lowercase English letter such that string becomes a subsequence (not necessarily continuous) of the string .
Output any such string, or say that it is impossible in case no string that respects the conditions exists.
Input
The first line contains a single integer () — the number of test cases.
The first line of each test case contains a single string (, and consists only of lowercase English letters and "?"-s) – the original string you have.
The second line of each test case contains a single string (, and consists only of lowercase English letters) – the string that should be a subsequence of string .
The sum of over all test cases doesn't exceed , where denotes the length of the string .
Output
For each test case, if no such string exists as described in the statement, output "NO" (without quotes).
Otherwise, output "YES" (without quotes). Then, output one line — the string that respects all conditions.
You can output "YES" and "NO" in any case (for example, strings "yEs", "yes", and "Yes" will be recognized as a positive response).
If multiple answers are possible, you can output any of them.
Samples
5
?????
xbx
ab??e
abcde
ayy?x
a
ab??e
dac
paiu
mom
YES
xabax
YES
abcde
YES
ayyyx
NO
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 |