938664978

分类

AI(18) algorithm(18) C(6) computer-vision(15) cuda(2) database(1) fortran(1) hardware(3) java(1) leetcode(39) MathModeling(19) matlab(5) other(8) python(68) robotics(13) web-development(4) 未归档(5)

/ 注册

全部文章（共226篇）

[leetcode126]word ladder 2

word ladder 2 Given two words (beginWord and endWord), and a dictionary’s word list, find all shortest transformation sequence(s) from beginWord to e...

2020-07-14

0 465

[笔记]图

graph 概念 vertex 节点 A vertex (also called a “node”) is a fundamental part of a graph. It can have a name, which we will call the “key.” A vertex may...

2020-07-14

0 575

[note]构建常量

一般情况下，python之中没有常量。但是，利用python的特性，可以构建“伪常量”，即一旦赋值便不能修改的变量。涉及到赋值，在python中一个对象的赋值是由__setattr__完成的。要想构建“伪常量”，必须对__setattr__这一函数进行修改。比如在contant_cl...

2020-07-14

0 448

[leetcode284]Peeking Iterator

问题描述： Given an Iterator class interface with methods: next() and hasNext(), design and implement a PeekingIterator that support the peek() operation ...

2020-07-14

0 425

[blabla]a quick code about linear regression using gradient descent

use linear regression to predict the house price the original data is from the cousera machine learning course. when I finished the exercise with MA...

2020-07-14

0 593

[leetcode54] Spiral Matrix

问题描述： Given a matrix of m x n elements (m rows, n columns), return all elements of the matrix in spiral order. For example, Given the followin...

2020-07-14

0 430

multithreading

转自：廖学峰大神多线程一个进程至少有一个线程。线程是操作系统直接支持的执行单元，因此，高级语言都支持多线程。 python的多线程是真正的posix thread，并不是模拟出来的线程。原来，在标准库中有多线程模块，_thread以及threading。其中，_thread是低...

2020-07-14

0 548

[leetcode64]Minimum Path Sum

问题描述： Given a m x n grid filled with non-negative numbers, find a path from top left to bottom right which minimizes the sum of all numbers along i...

2020-07-14

0 399

[leetcode279] perfect squares

问题描述： Given a positive integer n, find the least number of perfect square numbers (for example, 1, 4, 9, 16, ...) which sum to n. For example, g...

2020-07-14

0 480

[note]CardDeck

import collections import random Card = collections.namedtuple('Card', ["color","num"]) class Deck(object): nums = [str(i) f...

2020-07-14

0 507