原文链接: https://leetcode-cn.com/problems/range-sum-query-2d-immutable
英文原文Given a 2D matrix matrix, handle multiple quer
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原文链接: https://leetcode-cn.com/problems/range-sum-query-mutable
英文原文Given an integer array nums, handle multiple querie
原文链接: https://leetcode-cn.com/problems/flatten-nested-list-iterator
英文原文You are given a nested list of integers nested
原文链接: https://leetcode-cn.com/problems/data-stream-as-disjoint-intervals
英文原文Given a data stream input of non-negative
原文链接: https://leetcode-cn.com/problems/design-twitter
英文原文Design a simplified version of Twitter where users can post
原文链接: https://leetcode-cn.com/problems/insert-delete-getrandom-o1
英文原文Implement the RandomizedSet class:
Randomi
原文链接: https://leetcode-cn.com/problems/insert-delete-getrandom-o1-duplicates-allowed
英文原文RandomizedCollection is a dat
原文链接: https://leetcode-cn.com/problems/all-oone-data-structure
英文原文Design a data structure to store the strings' c
原文链接: https://leetcode-cn.com/problems/serialize-and-deserialize-bst
英文原文Serialization is converting a data structure
原文链接: https://leetcode-cn.com/problems/lfu-cache
英文原文Design and implement a data structure for a Least Frequently Used