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机器学习基础题目
1. 在深度学习中,涉及到大量矩阵相乘,现在需要计算三个稠密矩阵A,B,C的乘积ABC,假设三个矩阵的尺寸分别为m*n,n*p,p*q,且m<n<p<q,以下计算顺序效率最高的是: (AB)C 解析:首先,根据简单的矩阵知识,因为 A*B , A 的列数必须和 B 的行数相等。因此,可以排除C 选项 ...
分类:其他好文   时间:2017-08-15 23:34:54    阅读次数:437
2017.8.12 dp课小结
这节课难度超级大啊,基本上都是省选+NOI的题。 例1: 1801: [Ahoi2009]chess 中国象棋 Time Limit: 10 Sec Memory Limit: 64 MB Submit: 1868 Solved: 1075 [Submit][Status][Discuss] Des ...
分类:其他好文   时间:2017-08-13 00:04:34    阅读次数:179
iOS之Sqlite3封装
一、代码下载 代码下载地址 二、实例效果展示 三、实例项目简单介绍 这个实例主要是封装sqlite3数据库工具,并用这个工具实现记录、删除、改动、查询学生信息的功能。另外一个附属的功能就是依据学生的姓名首字母分组并加入索引。 对于数据库。我做了两层封装。第一层是对数据库的基本操作进行抽象。第二层是对 ...
分类:移动开发   时间:2017-08-12 10:09:12    阅读次数:324
POJ 3461 Oulipo
Description The French author Georges Perec (1936–1982) once wrote a book, La disparition, without the letter 'e'. He was a member of the Oulipo group ...
分类:其他好文   时间:2017-08-11 13:40:39    阅读次数:161
POJ_2251(初识广搜)
Description You are trapped in a 3D dungeon and need to find the quickest way out! The dungeon is composed of unit cubes which may or may not be fille ...
分类:其他好文   时间:2017-08-11 10:59:47    阅读次数:154
HDU - 1686 Oulipo
The French author Georges Perec (1936–1982) once wrote a book, La disparition, without the letter 'e'. He was a member of the Oulipo group. A quote fr ...
分类:其他好文   时间:2017-08-08 20:00:35    阅读次数:204
leetcode 405. Convert a Number to Hexadecimal
Given an integer, write an algorithm to convert it to hexadecimal. For negative integer, two’s complement method is used. Note: Example 1: Example 2: ...
分类:其他好文   时间:2017-08-08 16:50:05    阅读次数:186
hdoj 1686 Oulipo(kmp)
Problem Description The French author Georges Perec (1936–1982) once wrote a book, La disparition, without the letter 'e'. He was a member of the Ouli ...
分类:其他好文   时间:2017-08-08 13:58:14    阅读次数:192
leetcode 316. Remove Duplicate Letters
Given a string which contains only lowercase letters, remove duplicate letters so that every letter appear once and only once. You must make sure your ...
分类:其他好文   时间:2017-08-07 20:41:30    阅读次数:119
HDU 3172 Virtual Friends (map+并查集)
These days, you can do all sorts of things online. For example, you can use various websites to make virtual friends. For some people, growing their s ...
分类:其他好文   时间:2017-08-06 15:59:46    阅读次数:147
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