LeetCode Solutions

Contests

title	solution
weekly-contest-57	solution
weekly-contest-59	solution
weekly-contest-268	solution

Problems

solution	title	题名	answer	difficulty
1	Two Sum	两数之和	c++, go, java, js, scala	Easy
2	Add Two Numbers	两数相加	java	Medium
14	Longest Common Prefix	最长公共前缀	java	Easy
15	3Sum	三数之和	java	Medium
23	Merge k Sorted Lists	合并K个排序链表	java	Hard
33	Search in Rotated Sorted Array	搜索旋转排序数组	java	Medium
43	Multiply Strings	字符串相乘	go	Medium
81	Search in Rotated Sorted Array II	搜索旋转排序数组 II	java	Medium
84	Largest Rectangle in Histogram	柱状图中最大的矩形	java	Hard
85	Maximal Rectangle	最大矩形	java	Hard
98	Validate Binary Search Tree	验证二叉搜索树	java	Medium
140	Word Break II	单词拆分 II	java	Hard
146	LRU Cache	LRU缓存机制	java	Medium
155	Min Stack	最小栈	java	Easy
227	Basic Calculator II	227. 基本计算器 II	java	Medium
235	Lowest Common Ancestor of a Binary Search Tree	二叉搜索树的最近公共祖先	java	Easy
236	Lowest Common Ancestor of a Binary Tree	二叉树的最近公共祖先	java	Medium
386	Lexicographical Numbers	字典序排数	java	Medium
432	All O`one Data Structure	全 O(1) 的数据结构	java	Hard
525	Contiguous Array	连续数组	java	Medium
547	Friend Circles	朋友圈	java	Medium
695	Max Area of Island	岛屿的最大面积	java	Medium
720	Longest Word in Dictionary	词典中最长的单词	java	Easy
728	Self Dividing Numbers	自除数	go	Easy
729	My Calendar I	我的日程安排表 I	java, js	Medium
730	Count Different Palindromic Subsequences	统计不同回文子序列	go	Hard
731	My Calendar II	我的日程安排表 II	java	Medium
814	Binary Tree Pruning	二叉树剪枝	java	Medium
887	Super Egg Drop	鸡蛋掉落	java	Hard
971	Flip Binary Tree To Match Preorder Traversal	翻转二叉树以匹配先序遍历	java	Medium
1027	Longest Arithmetic Subsequence	最长等差数列	java	Medium
1072	Flip Columns For Maximum Number of Equal Rows	按列翻转得到最大值等行数	java	Medium
1161	Maximum Level Sum of a Binary Tree	最大层内元素和	java	Medium
1823	Find the Winner of the Circular Game	找出游戏的获胜者	java	Medium
2080	Range Frequency Queries	区间内查询数字的频率	java	Medium

Other Problems

solution	title	题名	answer	difficulty
search-rotate-array-lcci	-	搜索旋转数组	java	Medium