# Doubly Linked Lists and Arbitrary Sparse Matrices(repost)

An abitrary sparse matrix can be represented as a doubly linked list. Non-zero terms (and only non-zero terms) are stored in this linked list in row-major order. The class `DLLSparseMatrixTerm` defines the terms of the sparse matrix (similar to the relationship between `ChainNode` and `Chain`). Develop a Java class `DLLSparseMatrix` that implements `insert`, `clear`, and `transpose` of the sparse matrix. The transpose should be done in O(n2) time and O(1) space. Row-major representation means we store terms row by row. For example, the non-zero terms of the following sparse matrix

| 1 | 2 | | | |

| | 3 | 4 | | |

| 5 | | | 6 | |

| | 7 | | | |

can be represented in this sequence [1, 2, 3, 4, 5, 6, 7] in a row-major ordering.

When `transpose()` is invoked, the result matrix is

| 1 | | 5 | |

| 2 | 3 | | 7 |

| | 4 | | |

| | | 6 | |

| | | | |

So the terms are represented in this sequence [ 1, 5, 2, 3, 7, 4, 6] in row-major ordering.

The code for the class `DLLSparseMatrixTerm` is given in the [url removed, login to view] file in the codes.zip.

1. Write the code for the new class. (Import the dataStructures package from [url removed, login to view]).

2. Show that your transpose method takes *O*(*n*2) time and *O*(1) space. Be as precise as possible.

## Deliverables

1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done.

2) Deliverables must be in ready-to-run condition, as follows (depending on the nature of the deliverables):

a) For web sites or other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment.

b) For all others including desktop software or software the buyer intends to distribute: A software installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request.

3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement).

## Platform

Java

Beceriler: Mühendislik, Java, MySQL, PHP, Yazılım Mimarisi, Yazılım Test Etme

İşveren Hakkında:
( 8 değerlendirme ) United States

Proje NO: #3262730

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