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310. Minimum Height Trees
For an undirected graph with tree characteristics, we can choose any node as the root. The result graph is then a rooted tree. Among all possible root ...
分类:其他好文   时间:2020-06-26 10:21:01    阅读次数:53
全排列2 · Permutations
Given a collection of numbers that might contain duplicates, return all possible unique permutations. Example: Input: [1,1,2] Output: [ [1,1,2], [1,2, ...
分类:其他好文   时间:2020-06-25 23:47:18    阅读次数:92
一文告诉你Linux如何配置KVM虚拟化--安装篇
KVM全称"Kernel-based Virtual Machine",即基于内核的虚拟机,在linux内启用kvm需要硬件,内核和软件(qemu)支持,这篇文章教你如何配置并安装KVM虚拟机. 检查硬件和系统的兼容性 检查硬件虚拟化:LC_ALL=C lscpu | grep Virtualiza ...
分类:系统相关   时间:2020-06-25 23:24:38    阅读次数:150
mysql数据库_models 必知必会13条
必知必会13条 all *** # 取出所有 Book.objects.all().delete() ##删除所有对象 删除数据记录 filter *** # 过滤 Book.objects.filter(pk=1).update(price=190) 修改主键为1的书籍对象,的字段price为19 ...
分类:数据库   时间:2020-06-25 23:06:14    阅读次数:60
mysql错误详解(1819):ERROR 1819 (HY000): Your password does not satisfy the current policy requirements
O(∩_∩)O哈哈~ 在学习 Mysql 的时候又遇到了新问题了 o(╥﹏╥)o 当我在准备为用户授权的时候: grant all privileges on *.* to 'root'@'%' identified by '123456' with grant option; 遇到如下的情况o(╥ ...
分类:数据库   时间:2020-06-25 21:32:59    阅读次数:81
0030. Substring with Concatenation of All Words (H)
Substring with Concatenation of All Words (H) 题目 You are given a string, s, and a list of words, words, that are all of the same length. Find all star ...
分类:其他好文   时间:2020-06-25 21:20:39    阅读次数:56
reduce_mem_usage 降低内存使用 绘制学习率曲线和验证曲线
def reduce_mem_usage(df): """ iterate through all the columns of a dataframe and modify the data type to reduce memory usage. """ start_mem = df.memor ...
分类:其他好文   时间:2020-06-25 21:10:13    阅读次数:70
dedecms更换ueditor后上传附件将附件图标生成缩略图问题
打开ueditor.all.js 将 iconDir = URL + (URL.substr(URL.length - 1) == '/' ? '':'/') + 'dialogs/attachment/fileTypeImages/'; 更改为:iconDir = '/include/uedito ...
分类:Web程序   时间:2020-06-25 15:44:37    阅读次数:71
Leetcode: 1434. Number of Ways to Wear Different Hats to Each Other
Descpition There are n people and 40 types of hats labeled from 1 to 40. Given a list of list of integers hats, where hats[i] is a list of all hats pr ...
分类:其他好文   时间:2020-06-25 13:58:26    阅读次数:56
NtFlushBuffersFile
Hello all,i have some problem with NtFlushBuffersFile(). I should call it in virtual FS driver. Only one reference I have found - in ntdll.dll, but dr ...
分类:其他好文   时间:2020-06-25 10:16:30    阅读次数:70
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