我觉得要正确理解DALFactory.DataAccess这个函数，就先得理解什么事抽象工厂，设计模式自己没有学过。只是非常粗劣看了一下。抽象工厂的定义是这样的：提供一个创建一系列相关或相互依赖的接口，而无需指定它们具体的类。如果是从字面上的理解应该是给上一层或调用者提供一系列的功能的接口，让上层或调用者自己去实现。petshop是采用“面向接口”的思想。具体点（我也只知道这个例子吧）ICateg
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2024-04-09 09:38:19
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Given a list of non negative integers, arrange them such that they form the largest number. Notice The result may be very large, so you need to return
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2016-07-05 09:48:00
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Given a list of non negative integers, arrange them such that they form the largest number.For example, given[3, 30, 34, 5, 9], the largest formed num...
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2015-01-19 08:59:00
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Given a list of non negative integers, arrange them such that they form the largest number.For example, given [3, 30, 34, 5, 9], the largest formed nu...
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2015-09-15 21:28:00
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Given a list of non negative integers, arrange them such that they form the largest number.For example, given[3, 30, 34, 5, 9], the largest formed num...
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2015-01-15 17:18:00
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题目： Given a list of non negative integers, arrange them such that they form the largest number.For example, given [3, 30, 34, 5, 9], the largest formed number is 9534330.Note: The result may be very l
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2022-08-01 12:24:16
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刷刷书上的例题 在给定的N个整数A1，A2……An中选出两个进行XOR运算，得到的结果最大是多少？N<=105，0<=Ai<231 SOlution： 我们思考到对于两个数相异或，是先将两数转为二进制数，然后比较同一位上不同为1否则为0，然后观察题目发现每个数的二进制不会超过31位，那么容易想到直接
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2021-05-20 22:47:33
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A family hierarchy is usually presented by a pedigree tree where all the nodes on the same level belong to the same generation. Your task is to find t
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2020-04-02 09:28:00
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Givennnon-negative integers representing the histogram's bar height where the width of each bar is 1, find the area of largest rectangle in the histog...
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2014-11-29 14:39:00
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Given a list of non negative integers, arrange them such that they form
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2022-12-01 19:10:38
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题目链接：https://leetcode.com/problems/largest-number/题目：Given a list of non negative integers, arrange them such that they
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2023-07-27 00:01:53
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题目题意：给定家族树，求哪一层人数最多，人数为n>>m; vector<vector<int>> s(n+1); for(...
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2023-06-27 10:21:55
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聪明方法：其实干嘛要挨个比呢，按最直接的方法，接起来，谁大谁在前： 可以换一下思路，要想比较两个数在最终结果中的先后位置，何不直接比较一下不同组合的结果大小？ 举个例子：要比较3和34的先后位置，可以比较334和343的大小，而343比334大，所以34应当在前。 这样，有了比较两个数的方法，就可以
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2015-01-29 07:31:00
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2015-08-07 13:47:00
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Given a list of non negative integers, arrange them such that they form the largest number.For example, given[3, 30, 34, 5, 9], the largest formed num...
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2015-01-16 17:36:00
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Given a set of distinct positive integers, find the largest subset such that every pair (Si, Sj) of elements in this subset satisfies: Si % Sj = 0 or
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2016-08-02 10:27:00
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在给定的N个整数 A_1,A_2,…,A_N中选出两个进行异或运算，得到的结果最大是多少？Input第一行一个整数N。第二行N个整数 A_iOutput一个整数表示答案。Sample Input52 9 5 7 0Sample Output14HINT1<= N<= 10^5, 0<= A_i <2
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2020-03-05 11:19:00
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Given n non-negative integers representing the histogram's bar height where the width of each bar is 1, find the area of largest rectangle in the hist
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2016-06-30 12:11:00
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比较简单的数学问题 求最大可能的体积 由关系...
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2016-06-05 02:06:00
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类似于素数打表。 1 #include 2 #include 3 #include 4 #define maxn 1000100 5 using namespace std; 6 7 int f[maxn]; 8 9 void inti()10 {11 int num=0;12 ...
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2014-04-13 18:15:00
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