dsa2 min read
LFU Cache — HashMap + Frequency Buckets + DLL
Implement an LFU cache with O(1) get/put using three hash maps: key→val, key→freq, freq→OrderedDict.
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Lfu
3 articles
dsa2 min read
System Design DSA — Complete Guide (LRU, LFU, Caches, Data Structures)
Master system design problems that test data structure knowledge: LRU/LFU caches, Twitter feed, file systems, and 15+ design problems with full implementations.
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dsa4 min read
LFU Cache — O(1) Least Frequently Used Eviction
Implement an LFU cache with O(1) get and put. Uses two hashmaps and per-frequency doubly linked lists to track access frequency and recency simultaneously.
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