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RSS订阅原创 【leetcode】26. Remove Duplicates from Sorted Array
Given a sorted array nums, remove the duplicates in-place such that each element appear only once and return the new length.Do not allocate extra space for another array, you must do this by modifyi...
2019-04-01 21:23:34
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原创 【leetcode】14. Longest Common Prefix
Write a function to find the longest common prefix string amongst an array of strings.If there is no common prefix, return an empty string "".Example 1:Input: ["flower","flow","flight"]Output:...
2019-04-01 18:08:47
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原创 【记录】tensorflow报错DLL load failed:找不到指定程序
更新anoconda后出现了版本不兼容情况，keras不能正常使用，更新了tensorflow后测试报错如下：解决方法如提示：protobuf 这个库版本不兼容，按搜索到的方法将重新安装指定版本即可。命令如下：pip install protobuf==3.6.0总结：在网上搜索的时候出现了很多类似的报错，重点是看traceback里的提示，找到相关包的问题。 参考博文：...
2018-09-25 23:28:21
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原创 【每日一题Leetcode】-169. Majority Element
Given an array of size n, find the majority element. The majority element is the element that appears more than ⌊ n/2 ⌋ times.You may assume that the array is non-empty and the majority element alwa...
2018-08-24 12:31:01
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原创 【每日一题Leetcode】160. Intersection of Two Linked Lists
Write a program to find the node at which the intersection of two singly linked lists begins. For example, the following two linked lists:A: a1 → a2 ↘ ...
2018-08-23 12:29:13
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原创 【每日一题Leetcode】155. 最小 Stack
Design a stack that supports push, pop, top, and retrieving the minimum element in constant time.push(x) -- Push element x onto stack. pop() -- Removes the element on top of the stack. top() -- Ge...
2018-07-31 23:29:46
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原创 【每日一题Leetcode】-2. Add Two Numbers
You are given two non-empty linked lists representing two non-negative integers. The digits are stored in reverse order and each of their nodes contain a single digit. Add the two numbers and return i...
2018-07-25 16:07:10
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原创 【每日一题leetcode】-141 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?由于最开始没有弄清楚链表中循环可以从任何位置开始，判断条件是是否tail的值等于head。但是这个题是判断一个链表中是否存在有环，因此这个循环的起始位置是未知的。所以改变了思...
2018-07-23 15:00:00
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原创 【每日一题Leetcode】9. Palindrome Number
Determine whether an integer is a palindrome. An integer is a palindrome when it reads the same backward as forward.Example 1:Input: 121Output: trueExample 2:Input: -121Output: falseExpl...
2018-07-19 22:37:06
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原创 【每日一题Leetcode】7. Reverse Integer
不太喜欢这个题，主要考虑的点是溢出问题。Given a 32-bit signed integer, reverse digits of an integer.Example 1:Input: 123Output: 321Example 2:Input: -123Output: -321Example 3:Input: 120Output: 21N...
2018-07-18 12:25:58
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原创 【每日一题Leetcode】-136. Single Number
Given a non-empty array of integers, every element appears twice except for one. Find that single one.Note:Your algorithm should have a linear runtime complexity. Could you implement it without using ...
2018-07-12 16:34:15
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原创 【每日一题Leedcode】121. 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 to complete at most one transaction (i.e., buy one and sell one share of the stock), d...
2018-07-04 16:33:47
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原创 【每日一题Leetcode】104. Maximum Depth of Binary Tree
Given a binary tree, find its maximum depth.The maximum depth is the number of nodes along the longest path from the root node down to the farthest leaf node.Note: A leaf is a node with no children.Ex...
2018-07-02 13:35:32
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原创 【每日一题Leetcode】101Symmetric Tree
Given a binary tree, check whether it is a mirror of itself (ie, symmetric around its center).For example, this binary tree [1,2,2,3,4,4,3] is symmetric: 1 / \ 2 2 / \ / \3 4 4 3But the...
2018-06-29 14:47:33
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原创 【每日一题Leetcode】100. Same Tree
Given two binary trees, write a function to check if they are the same or not.Two binary trees are considered the same if they are structurally identical and the nodes have the same value.Example 1:In...
2018-06-28 16:39:34
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原创 【每日一题leetcode】70 Climbing Stairs
这道题花了蛮久时间，刚开始接触DP，需要多一些思维训练。 题目： **You are climbing a stair case. It takes n steps to reach to the top. Each time you can either climb 1 or 2 steps. In how many distinct ways can you climb to the t...
2018-06-27 17:18:56
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原创 【每日一题leetcode】53. Maximum Subarray
Given an integer array nums, find the contiguous subarray (containing at least one number) which has the largest sum and return its sum. Example:Input: [-2,1,-3,4,-1,2,1,-5,4],Output: 6Explan...
2018-06-25 17:54:54
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原创 【每日一题leetcode】Merge Two Sorted Lists
Merge two sorted linked lists and return it as a new list. The new list should be made by splicing together the nodes of the first two lists.Example:Input: 1->2->4, 1->3->4Output: 1->1...
2018-06-25 14:40:39
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原创 【每日一题leetcode】Search Insert Position
继续把知乎发的挪到这里https://zhuanlan.zhihu.com/p/38404527题目：Given a sorted array and a target value, return the index if the target is found. If not, return the index where it would be if it were inserted in o...
2018-06-25 14:40:01
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原创 【每日一题Leetcode】Valid Parentheses
继续搬https://zhuanlan.zhihu.com/p/36414513Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid.An input string is valid if:Open brackets ...
2018-06-25 14:38:17
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原创 【每日一题Leetcode】LeetCode-3. Longest Substring Without Repeating Characters
给刷题日常换个窝 搬自https://zhuanlan.zhihu.com/p/36340355今天的题目是给定一个字符串，返回无重复字符的最长子串Examples:Given "abcabcbb", the answer is "abc", which the length is 3.Given "bbbbb", the answer is "b", with the length of 1....
2018-06-25 14:33:36
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原创 深度学习-正则化
常用来防止过拟合的正则方法：L1 L2正则 L2是较常用的正则法，因其公式特性尽可能的考虑到了每一个特征。而L1是绝对值合，结果常常是一个稀疏矩阵。 在NN里，常用正则项 “Frobenius norm”J(w[1],b[1]...w[l],b[l])=1m∑ni=1L(y^(i),y)+λ2m∑ℓℓ=1∥W[ℓ]∥2FJ(w^{[1]},b^{[1]}...w^{[l]},b^{[l]})=\
2017-11-02 21:06:03
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原创 机器学习笔记一：线性回归
“回归”一词的来历： 原本是用来根据双亲的身高预测其一下代的身高，如果双亲高度高于平均值，其子女身高也倾向于比平均值高，但低于双亲身高。而双亲身高低于平均值的，子女身高倾向于比均值低，但是高于双亲身高。 预测值的两类都倾向于回归到均值，而不是与父母身高相同。Galton在多项研究中都注意到了这个现象。后来用这种方式来寻找一堆测量数据点的数学关系，而不是均值回归，但这种方法仍被称为回归。虽然这个单词
2017-07-05 18:33:20
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原创 电脑蓝屏0x000024解决记录
电脑突然不能正常打开cousera网站，其他操作也变慢，杀毒的时候突然蓝屏。提示如下图解决方法：删除近期安装的软件及补丁。重启后，恢复正常，网站也能正常打开~附加问题：1.office不能正常使用。安装包删除提示语言不支持，更改语言设置无效。 解决方法：下载office删除软件windows install clean up。该软件删除不完全。2.重新安装时报
2017-07-03 18:39:58
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