原创 26. Remove Duplicates from Sorted Array
Given a sorted array, remove the duplicates in-place such that each element appear only once and return the new length
2020-02-26 06:00:23
原创 173. Binary Search Tree Iterator
Implement an iterator over a binary search tree (BST). Your iterator will be initialized with the root node of a BST.
2020-02-26 06:00:23
原创 155. Min Stack
Design a stack that supports push, pop, top, and retrieving the minimum element in constant time. push(x) -- Push elem
2020-02-26 06:00:23
原创 285. Inorder Successor in BST
Given a binary search tree and a node in it, find the in-order successor of that node in the BST. Note: If the given n
2020-02-26 06:00:23
原创 127. Word Ladder
Given two words (beginWord and endWord), and a dictionary's word list, find the length of shortest transformation sequ
2020-02-26 06:00:23
原创 46. Permutations
Given a collection of distinct numbers, return all possible permutations. For example, [1,2,3] have the following per
2020-02-26 06:00:23
原创 238. Product of Array Except Self
Given an array of n integers where n > 1, nums, return an array output such that output[i] is equal to the product
2020-02-26 06:00:23
原创 33. Search in Rotated Sorted Array
Suppose an array sorted in ascending order is rotated at some pivot unknown to you beforehand. (i.e., 0 1 2 4 5 6 7 mig
2020-02-26 06:00:23
原创 165. Compare Version Numbers
Compare two version numbers version1 and version2. If version1 > version2 return 1, if version1 < version2 return -1,
2020-02-26 06:00:23
原创 102. Binary Tree Level Order Traversal
Given a binary tree, return the level order traversal of its nodes' values. (ie, from left to right, level by level).
2020-02-26 06:00:23
原创 24. Swap Nodes in Pairs
Given a linked list, swap every two adjacent nodes and return its head. For example, Given 1->2->3->4, you should retu
2020-02-26 06:00:23
原创 886. Possible Bipartition
Given a set of N people (numbered 1, 2, ..., N), we would like to split everyone into two groups of any size. Each pers
2018-10-20 23:41:21
原创 539. Minimum Time Difference
Given a list of 24-hour clock time points in "Hour:Minutes" format, find the minimum minutes difference between any two
2018-10-09 23:45:48
原创 394. Decode String
Given an encoded string, return it's decoded string. The encoding rule is: k[encoded_string], where the encoded_string
2018-09-29 23:42:40
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原创 635. Design Log Storage System
You are given several logs that each log contains a unique id and timestamp. Timestamp is a string that has the followi
2018-09-09 20:24:36