Is each question code in codechef unique

i was wondering if each question code is unique? i hope the question is clear or you can check this list Coding Problems by Difficulty Levels | CodeChef and in the code column there’s a unique identifier?

Yes. Problem Codes in Codechef are unique, so the problem links. The link to any problem is given by:

https://www.codechef.com/problems/<PROBLEM_CODE>.

Example:

https://www.codechef.com/problems/REDONE
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