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381. Insert Delete GetRandom O(1) - Duplicates allowed - Hard
Design a data structure that supports all following operations in average O(1) time. Note: Duplicate elements are allowed. Example: 380. Insert Delete ...
分类:其他好文   时间:2019-01-03 16:38:26    阅读次数:127
Modern C++ Course [Lecture 7] {Pointers, const with pointers, Stack and Heap, Memory leaks, Dangling pointers}
https://en.cppreference.com/w/cpp/language/range-for every object has a pointer to itsleft. stack operations are very quick it's computationally expen ...
分类:编程语言   时间:2019-01-01 12:31:54    阅读次数:241
effective java——30使用enum
1, 2.使用更为简洁的方式表达+ - * / package com.enum30demo2.www; import com.sun.org.apache.xpath.internal.operations.Minus; public enum Operation { PLUS{double ap ...
分类:编程语言   时间:2018-12-26 00:35:18    阅读次数:259
Android Studio 引入 Git 并提交代码
File Settings Version Control Git Path to Git executable 选择本地 Git 可执行文件 Test VCS VCS Operations Popup Git 项目结构切换为 Project 项目名文件夹上右键 Git Add 项目结构切换为 Pr ...
分类:移动开发   时间:2018-12-20 10:33:25    阅读次数:231
Horovod 通信策略
因为最近的工作要和Horovod打交道,所以分析了Horovod的源码。在这里记一笔。 Horovod有几个亮点,第一,它不依托于某个框架,自己通过MPI建立了一套分布式系统,完成了allreduce, allgather等collective operations通信工作. 第二,发现了Tenso ...
分类:其他好文   时间:2018-12-18 10:59:27    阅读次数:139
OCP-1Z0-051-V9 02-2题
2. View the Exhibit to examine the description for the SALES table. Which views can have all DML operations performed on it? (Choose all that apply.) ...
分类:其他好文   时间:2018-12-16 11:52:30    阅读次数:155
Pandas文摘:Applying Operations Over pandas Dataframes
原文地址:https://chrisalbon.com/python/data_wrangling/pandas_apply_operations_to_dataframes/ Applying Operations Over pandas Dataframes 20 Dec 2017 Import ...
分类:移动开发   时间:2018-12-16 11:06:40    阅读次数:166
devops的理解
DevOps(Development和Operations的组合词)是一种重视“软件开发人员(Dev)”和“IT运维技术人员(Ops)” DevOps是一组过程、方法与系统的统称,用于促进开发(应用程序/软件工程)、技术运营和质量保障(QA)部门之间的沟通、协作与整合。 ...
分类:其他好文   时间:2018-12-04 21:13:09    阅读次数:213
[LeetCode&Python] Problem 598. Range Addition II
Given an m * n matrix M initialized with all 0's and several update operations. Operations are represented by a 2D array, and each operation is repres ...
分类:编程语言   时间:2018-12-02 14:29:12    阅读次数:206
UVA11992 Fast Matrix Operations
"传送门" 发现最多只有20行,所以开20个线段树处理即可。当然存在更优的做法,就是一行接着一行,变成一个线段树,节省空间。 cpp include include include define MAXN 1000006 define lson (rt 1) define sizel (((l+r) ...
分类:其他好文   时间:2018-12-01 20:22:17    阅读次数:194
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