Optimal techniques for common linked list operations using pointer manipulation, particularly the two-pointer (slow/fast) and three-pointer techniques. Linked List Structure 1type ListNode struct { 2 Val int 3 Next *ListNode 4} 5 6// Helper to create a list from array 7func CreateList(values []int) *ListNode { 8 if …

Cache replacement policies determine which items to evict when the cache is full. LRU (Least Recently Used) and LFU (Least Frequently Used) are two popular strategies. LRU Cache (Least Recently Used) Evicts the least recently accessed item when cache is full. Operations get(key): Return value if exists, mark as …