# Algorithms 算法代写：学霸1对1辅导，85%+高分通过

Java工程师使用数据结构来存储和组织数据，而我们使用算法来操作这些结构中的数据。对数据结构和算法以及它们如何协同工作的了解越多，Java 程序就会越高效。

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### 算法代写服务流程

Step1：添加微信：maxxuezhang，提交作业需求

Step2：支付定金，开始任务

Step3：准时交付，获取高分

Step4：完成订单

1. (5%) A program called DijkstraLabeller.java tries to label the shortest path for a given weighted graph with a starting vertex by harnessing Dijkstra’s algorithm. It may work but not be perfect. Please study this implementation carefully and point out its weakness(es), which can be such as lacking enough information in returned objects, low efficiency etc. When you find out a point, you need to make an in-depth analysis.

For example, assume that this implementation has a low-efficiency issue; you need to specify where they are from, their time complexity, etc.

2. (10%) Based on the analysis from the previous step, you need to reimplement this solution to solve these issues. You need to create a new java class named DijkstraLabeller2.java within the package dsa.algorithms. If needed, you can create a few other classes. For example, as we mentioned in our lecture, if you want to use an adaptable priority queue, you may need to create a new interface and its implementation as well. In your solution, you can use java built-in data structures, such as Map, List etc. However, a graph and its edges and vertices must be represented by the classes provided within the assignment.

3. (5%) Create a test class named TestDijkstraLabeller.java to check that your solution is correct and make comparisons with the previous solution.

1.（5%）一个名为DijkstraLabeller.java的程序试图通过利用Dijkstra的算法为一个给定的加权图的起始顶点标注最短路径。它可能有效，但并不完美。请仔细研究这个实现并指出它的弱点，比如在返回的对象中缺乏足够的信息，效率低等。当你发现一个问题时，你需要做一个深入的分析。

2、（10%）根据上一步的分析，你需要重新实现这个方案来解决这些问题。你需要在dsa.algorithms包内创建一个名为DijkstraLabeller2.java的新java类。如果需要，你还可以创建一些其他的类。例如，正如我们在讲座中提到的，如果你想使用一个可适应的优先级队列，你可能也需要创建一个新的接口和它的实现。在你的解决方案中，你可以使用java内置的数据结构，如Map、List等。但是，图及其边和顶点必须由作业中提供的类来表示。

3、（5%）创建一个名为TestDijkstraLabeller.java的测试类，以检查你的解决方案是否正确，并与之前的解决方案进行比较。

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