2019年7月13日

链表知识点总结

摘要: 凡是链表结构发生变化的,都需要 Dummy Node. 链表常用基本功: • 反转 Reverse • 归并 Merge • 找中点 Median • 增删查改 CRUD 链表查找中点: fast-slow two pointers. slow = head fast = head while sl 阅读全文

posted @ 2019-07-13 14:36 Sheryl Wang 阅读(196) 评论(0) 推荐(0) 编辑

2018年10月5日

523. Continuous Subarray Sum

摘要: Given a list of non-negative numbers and a target integer k, write a function to check if the array has a continuous subarray of size at least 2 that 阅读全文

posted @ 2018-10-05 17:50 Sheryl Wang 阅读(206) 评论(0) 推荐(0) 编辑

269. Alien Dictionary

摘要: There is a new alien language which uses the latin alphabet. However, the order among letters are unknown to you. You receive a list of non-empty word 阅读全文

posted @ 2018-10-05 16:35 Sheryl Wang 阅读(146) 评论(0) 推荐(0) 编辑

2018年10月4日

277. Find the Celebrity

摘要: Suppose you are at a party with n people (labeled from 0 to n - 1) and among them, there may exist one celebrity. The definition of a celebrity is tha 阅读全文

posted @ 2018-10-04 17:46 Sheryl Wang 阅读(148) 评论(0) 推荐(0) 编辑

785.Is Graph Bipartite?

摘要: Given an undirected graph, return true if and only if it is bipartite. Recall that a graph is bipartite if we can split it's set of nodes into two ind 阅读全文

posted @ 2018-10-04 15:26 Sheryl Wang 阅读(121) 评论(0) 推荐(0) 编辑

2018年10月3日

689. Maximum Sum of 3 Non-Overlapping Subarrays

摘要: In a given array nums of positive integers, find three non-overlapping subarrays with maximum sum. Each subarray will be of size k, and we want to max 阅读全文

posted @ 2018-10-03 16:32 Sheryl Wang 阅读(105) 评论(0) 推荐(0) 编辑

2018年10月2日

29. Divide Two Integers

摘要: 这题 Given two integers dividend and divisor, divide two integers without using multiplication, division and mod operator. Return the quotient after div 阅读全文

posted @ 2018-10-02 11:49 Sheryl Wang 阅读(84) 评论(0) 推荐(0) 编辑

2018年10月1日

Serialize and Deserialize Binary Tree

摘要: Serialization is the process of converting a data structure or object into a sequence of bits so that it can be stored in a file or memory buffer, or 阅读全文

posted @ 2018-10-01 21:42 Sheryl Wang 阅读(90) 评论(0) 推荐(0) 编辑

2018年9月24日

sliding window substring problem汇总贴

摘要: Find All Anagrams in a String: https://leetcode.com/problems/find-all-anagrams-in-a-string/description/ Minimum Window Substring: https://leetcode.com 阅读全文

posted @ 2018-09-24 18:41 Sheryl Wang 阅读(93) 评论(0) 推荐(0) 编辑

10. Regular Expression Matching

摘要: Given an input string (s) and a pattern (p), implement regular expression matching with support for '.' and '*'. The matching should cover the entire  阅读全文

posted @ 2018-09-24 12:30 Sheryl Wang 阅读(121) 评论(0) 推荐(0) 编辑

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