It seems the problem description is missing (the image couldn't be processed). Could you please provide the problem statement in text form? This will help me understand the task and give you an accurate solution. For example, if it's about parentheses, strings, arrays, or any other topic, sharing the details (like input, output requirements, constraints) would be essential.

Looking forward to your text description!

作者声明:本文包含人工智能生成内容。