Implement a GIF Data Structure / Decoder-Related Problem (LinkedList + HashMap)

Problem: Implement a GIF-related data structure / algorithm (LinkedList + HashMap) In two coding rounds, the interviewer referred to a “GIF problem” and hinted that the correct solution uses LinkedList + HashMap. Because the original post does not provide a full problem statement (missing inputs/outputs/constraints/examples), the question cannot be reliably reconstructed into an answerable coding prompt and is therefore not further completed.