原创 LeetCode--Single Number II
Given an array of integers, every element appears three times except for one. Find that single one. Note: Your algor
2020-06-13 22:07:28
原创 LeetCode--Pascal's Triangle
Given numRows, generate the first numRows of Pascal's triangle. For example, given numRows = 5, Return [ [1],
2020-06-13 22:07:28
原创 LeetCode--Best Time to Buy and Sell Stock
Say you have an array for which the ith element is the price of a given stock on day i. If you were only permitted t
2020-02-25 12:00:25
原创 LeetCode--Valid Palindrome
Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases. For ex
2020-02-25 12:00:25
原创 LeetCode--Reorder List
Given a singly linked list L: L0→L1→…→Ln-1→Ln, reorder it to: L0→Ln→L1→Ln-1→L2→Ln-2→… You must do this in-place with
2020-02-25 12:00:25
原创 LeetCode--Populating Next Right Pointers in Each Node
Given a binary tree struct TreeLinkNode { TreeLinkNode *left; TreeLinkNode *right; TreeLinkNode
2020-02-25 12:00:14
原创 LeetCode--Convert Sorted List to Binary Search Tree
Given an array where elements are sorted in ascending order, convert it to a height balanced BST. /** * Definition for
2020-02-25 12:00:14
原创 LeetCode--Binary Tree Preorder Traversal
Given a binary tree, return the preorder traversal of its nodes' values. For example: Given binary tree {1,#,2,3},
2020-02-25 12:00:14
原创 LeetCode--Populating Next Right Pointers in Each Node II
Follow up for problem "Populating Next Right Pointers in Each Node". What if the given tree could be any binary tree
2020-02-25 12:00:14
原创 LeetCode--Linked List Cycle
Given a linked list, determine if it has a cycle in it. Follow up: Can you solve it without using extra space? /**
2020-02-25 12:00:14
原创 LeetCode--Balanced Binary Tree
Given a binary tree, determine if it is height-balanced. For this problem, a height-balanced binary tree is defined
2020-02-25 12:00:14
原创 LeetCode--Single Number
Given an array of integers, every element appears twice except for one. Find that single one. Note: Your algorithm s
2020-02-25 12:00:14
原创 LeetCode--Best Time to Buy and Sell Stock II
Say you have an array for which the ith element is the price of a given stock on day i. Design an algorithm to find
2020-02-25 12:00:04
原创 LeetCode--Linked List Cycle II
Given a linked list, return the node where the cycle begins. If there is no cycle, return null. Follow up: Can you s
2020-02-25 12:00:04
原创 LeetCode--Pascal's Triangle II
Given an index k, return the kth row of the Pascal's triangle. For example, given k = 3, Return [1,3,3,1]. Note: Co
2020-02-25 12:00:04