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https://leetcode.com/problems/implement-trie-prefix-tree/ Implement Trie (Prefix Tree) - LeetCode Level up your coding skills and quickly land a job. This is the best place to expand your knowledge and get prepared for your next interview. leetcode.com Solution class Trie: def __init__(self): self.dic = {} def insert(self, word): temp = self.dic for c in word: if not temp.get(c): temp[c] = {} te..

https://leetcode.com/problems/min-stack/ Min Stack - LeetCode Level up your coding skills and quickly land a job. This is the best place to expand your knowledge and get prepared for your next interview. leetcode.com Design a stack that supports push, pop, top, and retrieving the minimum element in constant time. Implement the MinStack class: MinStack() initializes the stack object. void push(va..

https://leetcode.com/problems/lru-cache/ LRU Cache - LeetCode Level up your coding skills and quickly land a job. This is the best place to expand your knowledge and get prepared for your next interview. leetcode.com Design a data structure that follows the constraints of a Least Recently Used (LRU) cache. Implement the LRUCache class: LRUCache(int capacity) Initialize the LRU cache with positiv..