小白兔云

2019年4月14日

leetcode [116]Populating Next Right Pointers in Each Node

摘要： You are given a perfect binary tree where all leaves are on the same level, and every parent has two children. The binary tree has the following defin 阅读全文

posted @ 2019-04-14 15:51 小白兔云阅读(122) 评论(0) 推荐(0)

leetcode [113]Path Sum II

摘要： Given a binary tree and a sum, find all root-to-leaf paths where each path's sum equals the given sum. Note: A leaf is a node with no children. Exampl 阅读全文

posted @ 2019-04-14 15:08 小白兔云阅读(212) 评论(0) 推荐(0)

2019年4月11日

leetcode [98]Validate Binary Search Tree

摘要： Given a binary tree, determine if it is a valid binary search tree (BST). Given a binary tree, determine if it is a valid binary search tree (BST). As 阅读全文

posted @ 2019-04-11 15:35 小白兔云阅读(127) 评论(0) 推荐(0)

LSTM算法原理理解

摘要：神经网络模拟人类大脑神经网络结构，每个神经元和其他的神经元相互连接，当它兴奋的时候会向相连的神经元发送化学物质，从而改变神经元的电位，当神经元的电位超过阈值，它会被激活，向其他神经元发送化学物质。其实神经网络的本质就是学习从输入到输出的函数映射，因为遇到一个未知的问题，无法对问题进行函数建模，利用阅读全文

posted @ 2019-04-11 11:51 小白兔云阅读(6775) 评论(0) 推荐(0)

2019年4月10日

leetcode [95]Unique Binary Search Trees II

摘要： Given an integer n, generate all structurally unique BST's (binary search trees) that store values 1 ... n. Example: 题目大意：给定1到n这n个数字，返回集合，集合中存放所有可能二叉阅读全文

posted @ 2019-04-10 17:36 小白兔云阅读(145) 评论(0) 推荐(0)

leetcode [96]Unique Binary Search Trees

摘要： Given n, how many structurally unique BST's (binary search trees) that store values 1 ... n? Example: 题目大意：给定1到n这n个数字，找出n个数字所有可能的组成的二叉搜索树的个数。解法：采用动阅读全文

posted @ 2019-04-10 17:10 小白兔云阅读(108) 评论(0) 推荐(0)

2019年4月9日

leetcode [93]Restore IP Addresses

摘要： Given a string containing only digits, restore it by returning all possible valid IP address combinations. Example: 题目大意：给定一个字符串，返回可能的ip列表解法：采用dfs方阅读全文

posted @ 2019-04-09 14:46 小白兔云阅读(127) 评论(0) 推荐(0)

leetcode [91]Decode Ways

摘要： A message containing letters from A-Z is being encoded to numbers using the following mapping: Given a non-empty string containing only digits, determ 阅读全文

posted @ 2019-04-09 14:39 小白兔云阅读(180) 评论(0) 推荐(0)

leetcode [86]Partition List

摘要： Given a linked list and a value x, partition it such that all nodes less than x come before nodes greater than or equal to x. You should preserve the 阅读全文

posted @ 2019-04-09 14:24 小白兔云阅读(131) 评论(0) 推荐(0)

leetcode [89]Gray Code

摘要： The gray code is a binary numeral system where two successive values differ in only one bit.Given a non-negative integer n representing the total numb 阅读全文

posted @ 2019-04-09 10:14 小白兔云阅读(144) 评论(0) 推荐(0)

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