This question asks what kind of algorithm could be used to solve a particular problem. It has received a close vote as a resource request. That was my first instict, too, but actually asking about algorithms is not covered in the close vote reason:
Questions asking us to find or recommend tools, libraries, programming languages, resources (including books, blogs, tutorials, and examples), or projects to undertake are off-topic on Programmers as they attract opinionated answers that won't have lasting value to others.
An algorithm is arguably not a tool, library, language, resource, or project.
Also the difference could be seen as significant. "What algorithm could solve my problem" could be seen as "How can I approach/solve this problem?" rather than merely a shopping request. I could easily see such a question being rewritten so that it did not attract close votes (yet received substantively the same kind of answers). The same is not true of a question like "What programming language should I use?"
Note: I'm not arguing the linked question is good; it also seems quite vague and broad, so it should probably be closed or improved regardless. But I'm still interested in this question from a theoretical standpoint.