Exercise: Hash Table Problems on LeetCode labuladong Original About 14415 words
1. 两数之和 https://leetcode.cn/problems/two-sum 1. Two Sum https://leetcode.com/problems/two-sum 128. 最长连续序列 https://leetcode.cn/problems/longest-consecutive-sequence 128. Longest Consecutive Sequence https://leetcode.com/problems/longest-consecutive-sequence 290. 单词规律 https://leetcode.cn/problems/word-pattern 290. Word Pattern https://leetcode.com/problems/word-pattern 519. 随机翻转矩阵 https://leetcode.cn/problems/random-flip-matrix 519. Random Flip Matrix https://leetcode.com/problems/random-flip-matrix 138. 复制带随机指针的链表 https://leetcode.cn/problems/copy-list-with-random-pointer 138. Copy List with Random Pointer https://leetcode.com/problems/copy-list-with-random-pointer 1490. 克隆 N 叉树 https://leetcode.cn/problems/clone-n-ary-tree 1490. Clone N-ary Tree https://leetcode.com/problems/clone-n-ary-tree 133. 克隆图 https://leetcode.cn/problems/clone-graph 133. Clone Graph https://leetcode.com/problems/clone-graph 242. 有效的字母异位词 https://leetcode.cn/problems/valid-anagram 242. Valid Anagram https://leetcode.com/problems/valid-anagram 49. 字母异位词分组 https://leetcode.cn/problems/group-anagrams 49. Group Anagrams https://leetcode.com/problems/group-anagrams 387. 字符串中的第一个唯一字符 https://leetcode.cn/problems/first-unique-character-in-a-string 387. First Unique Character in a String https://leetcode.com/problems/first-unique-character-in-a-string 169. 多数元素 https://leetcode.cn/problems/majority-element 169. Majority Element https://leetcode.com/problems/majority-element 389. 找不同 https://leetcode.cn/problems/find-the-difference 389. Find the Difference https://leetcode.com/problems/find-the-difference 442. 数组中重复的数据 https://leetcode.cn/problems/find-all-duplicates-in-an-array 442. Find All Duplicates in an Array https://leetcode.com/problems/find-all-duplicates-in-an-array 448. 找到所有数组中消失的数字 https://leetcode.cn/problems/find-all-numbers-disappeared-in-an-array 448. Find All Numbers Disappeared in an Array https://leetcode.com/problems/find-all-numbers-disappeared-in-an-array Prerequisites
Before reading this article, you should first learn:
Hash tables are a commonly tested data structure in algorithm problems, mainly appearing in data structure design questions or in combination with arrays, strings, and other structures (such as the previous Prefix Sum Exercises ). Here are some common hash table questions.
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