Data Structure Pairing: Deque + Hash Map (Rolling-Window Dedup)
A reusable pattern for time based sliding window uniqueness problems — combining a deque for order (window) and a hash map for O(1) insertions/lookups/deletes
A reusable pattern for time based sliding window uniqueness problems — combining a deque for order (window) and a hash map for O(1) insertions/lookups/deletes