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全部文章（共226篇）

[DP]strategy

# coding: utf-8 # # Srategy Pattern # 策略模式定义一系列算法并封装它们，这些算法可以互换。 # 策略模式还根据不同的对象使用不同的算法。 # ## class implement # In[10]: import abc import collectio...

2020-07-14

0 376

[DP] 后缀表达式与求值 visitor

后缀表达式与求值 # In[1]: class Node(object): pass class BinaryOperator(Node): def __init__(self, left, right): self.left = left ...

2020-07-14

0 493

[leetcode299]Bulls and Cows

问题描述： You are playing the following Bulls and Cows game with your friend: You write a 4-digit secret number and ask your friend to guess it. Each ...

2020-07-14

0 483

[leetcode300] Longest Increasing Subsequence

问题描述： Given an unsorted array of integers, find the length of longest increasing subsequence. For example, Given [10, 9, 2, 5, 3, 7, 101, 18], T...

2020-07-14

0 409

[leetcode287] Find the Duplicate Number

问题描述： Find the Duplicate Number My Submissions <button class="btn btn-default active" type="button&quo...

2020-07-14

0 427

[note] Iterator and Iterable

Iterator and Iterable 引言 unfortunately, the versions of Setence below are bad ideas and not pythonic. 实际工作中，要从一个英文句子中逐步迭代处其中的单词，代码可以这...

2020-07-14

0 468

[note]how a generator works

how a generator works A Sentence class was discussed in the previous blog. however, the versions of Sentence haven been created are not py...

2020-07-14

0 405

[note] Basic Information

1.Keywords Keywords Keywords are special words that are reserved by Python and cannot be used by you to name things. They indicate commands...

2020-07-14

0 977

计算逆序数对

python语言： #-*- coding:utf-8 -*- #import pdb def sort_count(data): """ using merge sort and count inversion ""&...

2020-07-14

0 482

最大堆

问题： Max Heap 题目内容：實作Max heap的三種操作：push, pop, top。指令0 x：代表push，將x push進max heap。指令1 : 代表pop，將最大的數字pop出來，若heap為空則忽略這道指令。指令2 : 代表top，將最大的數字印出來，若heap...

2020-07-14

0 474