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Fast Matrix Operations
有一个r行c列的全0矩阵,有以下三种操作。 1 X1 Y1 X2 Y2 v 子矩阵(X1,Y1,X2,Y2)的元素加v 2 X1 Y1 X2 Y2 v 子矩阵(X1,Y1,X2,Y2)的元素变为v 3 X1 Y1 X2 Y2 查询子矩阵(X1,Y1,X2,Y2)的和,最大值,最小值 1 X1 Y1 ...
分类:其他好文   时间:2018-11-09 00:50:46    阅读次数:163
370 Range Addition
Assume you have an array of length n initialized with all 0's and are given k update operations. Each operation is represented as a triplet: [startInd... ...
分类:其他好文   时间:2018-11-08 18:33:41    阅读次数:165
232.Implement Queue using Stacks
Implement the following operations of a queue using stacks. push(x) Push element x to the back of queue. pop() Removes the element from in front of qu ...
分类:其他好文   时间:2018-11-05 16:23:58    阅读次数:149
[LeetCode] Design Circular Queue 设计环形队列
Design your implementation of the circular queue. The circular queue is a linear data structure in which the operations are performed based on FIFO (F ...
分类:其他好文   时间:2018-11-03 01:55:33    阅读次数:184
Pandas DataFrame 数据选取和过滤
This would allow chaining operations like: pd.read_csv('imdb.txt') .sort(columns='year') .filter(lambda x: x['year']>1990) # < this is missing in Pand ...
分类:其他好文   时间:2018-10-31 14:02:56    阅读次数:324
机器学习系列-tensorflow-01-急切执行API
tensorflow急切执行概述 Eager execution is an imperative, define by run interface where operations are executed immediately as they are called from Python. T ...
分类:Windows程序   时间:2018-10-31 00:04:14    阅读次数:392
使用结构体 file_operations封装驱动设备的操作
最近学习到了Linux驱动章节的课程,对设备的对应驱动的注册有些困惑,看了下发现是把设备的所有操作方法封装到结构体 file_operations 中,这个结构体为所有的设备文件都提供了统一的操作函数接口。然后把这个结构体连同设备的主设备号、名字(没啥用)一起,通过函数 register_chrde ...
分类:其他好文   时间:2018-10-27 19:56:49    阅读次数:194
146 LRU Cache
Design and implement a data structure for Least Recently Used (LRU) cache. It should support the following operations: get and put. get(key) - Get the ...
分类:系统相关   时间:2018-10-25 17:08:06    阅读次数:181
[leetcode]380. Insert Delete GetRandom O(1)常数时间插入删除取随机值
Design a data structure that supports all following operations in average O(1) time. Example: 思路 HashMap + ArrayList 代码 ...
分类:其他好文   时间:2018-10-24 10:51:18    阅读次数:117
thread safe queue --cruise
Implement a Queue with pop and push operations using concurrency coding. package com.company; import java.util.*; import java.util.concurrent.locks.*;... ...
分类:其他好文   时间:2018-10-24 10:43:25    阅读次数:114
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