Master this problem using the Linked List pattern.
When approaching Remove Duplicates from Sorted List II, look for key problem signals that suggest using the Linked List pattern. Focus on reducing redundant iterations, maintaining state invariant, and optimizing space-time complexity.
Key Invariant
Maintain optimal range bounds or hash frequency state during traversal.
Expected Complexity
Time: O(N) or O(N log N) | Space: O(1) to O(N)
Study Resource
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