建造者模式中，一些基本部件的实现应该是不怎么变化的，它更关注于指挥者装配并组合部件的过程，对应生活中的KFC，汉堡、可乐、薯条等是不变的，而其组合是经常变化的，演变出各式各样的套餐。...

Given an integer number n, return the difference between the product of its digits and the sum of its digits.

本着让读者一看就懂的写作理念，我这里并不打算用官方那种难以理解的概念去解释建造者模式。简单粗暴直接举例说明

Given an integer array nums, find the contiguous subarray within an array (containing at least one number) which has the largest product.

Given an array nums of n integers where n > 1, return an array output such that output[i] is equal to the product of all the elements of nums except nums[i].

Given a string array words, find the maximum value of length(word[i]) * length(word[j]) where the two words do not share common letters. You may assume that eac...

Given a positive integer n, break it into the sum of at least two positive integers and maximize the product of those integers. Return the maximum product you c...

Given two non-negative integers num1 and num2 represented as strings, return the product of num1 and num2.

但是，欧拉所研究的范围早就依托于数学涉及到物理，天文等各个领域。在本系列文章的收尾部分，我们就来介绍一下，在现代经济学中一个非常重要的理论——边际生产力分配理论，也叫经济学欧拉定理。...

工厂方法(Factory Method)模式的意义是定义一个创建产品对象的工厂接口，将实际创建工作推迟到子类当中。核心工厂类不再负责产品的创建，这样核心类成为一个抽象工厂角色，仅负责具体工厂子类必须实现的接口，这样进一步抽象...