You now understand linked list fundamentals: Core Techniques: - Traversal with null checks - Dummy head for cleaner code - Three-pointer reversal - Fast-slow pointer for middle and cycles Key Patterns: - Reversal: iterative with prev/current/next - Cycle detection: fast catches slow inside cycle - Merge: compare heads, append smaller - LRU: hash map + doubly linked list Complexity: - Traversal: time, space - Reversal: time, space iterative - LRU operations: time These pointer manipulation skills transfer directly to trees and graphs. Every tree traversal is linked list traversal with two next pointers instead of one.
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$ curl repovive.com/roadmaps/data-structures/linked-lists/section-recap
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