merge sorting, Data Structure & Algorithms

Assignment Help:
ESO207: Programming Assignment 1
Due on 6 Sept, 2015. To be submitted online.
Problem In this assignment you are required to implement k-way Merge Sort algorithm. In this version partition the input sequence of integers into k almost equal (may di?er by at most 1) subsequences, recursively sort, and then merge the k sequences. Input: A positive integer n, a sequence of integers (a1,a2,...,an), and a positive integer k = 2. Goal: Design a program KWMS(A,i,j,k) which sorts in decreasing order the integers contained in an array A in the index range i : j (including i and j) using k-way merge. After the completion of sorting the program should print A[i : j] starting from the new line: The sorted list in the range i:j is ........ Details: Please implement the program by strictly following these step. 1. Use three global arrays A,B,C. A contains the input sequence. B is used to form a MaxHeap, and C is used for temporary storage. 2. Let a = d(j -i + 1)/ke,b = b(j -i + 1)/kc,r = (j -i + 1)%k (remainder of (j -i + 1)÷k). Partition the array A[i : j] into A[i : i+a-1],A[i+a : i+2a-1],...,A[i+(r-1)a : i+ra-1],A[i+ra : i + ra + b],A[i + ra + b : i + ra + 2b],.... 3. In order to perform k-way merge implement a MaxHeap on another array B. Let B be a 2D array with the range [0 : 1][1 : k]. To store integer x of subarray j by setting B[0][a] = x and B[1][a] = j. 4. To perform merge operation, ?rst enter the greatest element of each non-empty sub-array into the heap, starting from the leftmost subarray (lower indices to the higher indices). Then each time the greatest element is extracted from the Heap, identify its subarray from B[][1] and insert the next element from that subarray into the heap. If that sub-array becomes empty, then no insertion will occur. MaxHeap
1
must be implemented exactly the way we discussed in the class. Use HeapSize to keep track of the number of elements currently in the heap. 5. The merge must be done into array C and then its content must be transferred back to A. 6. Take the array A and C lengths to be 1000 each. 7. To help us evaluate the correctness of the program, please print from a fresh line Content of the heap is B[0][1],B[0][2],...,B[0][k] after each extraction+insertion (or after extraction, if no insertion happens) in the heap. At the end of the routine KWMS(A,i,j,k) put a print statement which prints from a fresh line The sorted list in the range i : j is A[i],A[i + 1],...,A[j]. Note that this being a recursive program this statement will get printed after each recursive call.
2

Related Discussions:- merge sorting

Define approximating smooth surfaces with polygon nets, Approximating smoot...

Approximating smooth surfaces with Polygon nets Networks of polygons are used to represent smooth surfaces. They are, of course, only an approximation to the true surface, but

Graph connectivity, A connected graph is a graph wherein path exists among ...

A connected graph is a graph wherein path exists among every pair of vertices. A strongly connected graph is a directed graph wherein every pair of distinct vertices is connecte

Determine in brief about the boolean, Determine in brief about the Boolean ...

Determine in brief about the Boolean Carrier set of the Boolean ADT is the set {true, false}. Operations on these values are negation, conjunction, disjunction, conditional,

Applications of b-trees, A database is a collection of data organized in a ...

A database is a collection of data organized in a manner that facilitates updation, retrieval and management of the data. Searching an unindexed database having n keys will have a

Compare and contrast various sorting techniques, Q. Compare and contrast va...

Q. Compare and contrast various sorting techniques or methods with respect to the memory space and the computing time.

Algorithm, Describe different methods of developing algorithms with example...

Describe different methods of developing algorithms with examples.

Data communication, #question.explain different types of errors in data tra...

#question.explain different types of errors in data transmission.

Balance theorem, Question 1 Discuss the following theorems with respect to...

Question 1 Discuss the following theorems with respect to Splay Trees- Balance Theorem Dynamic Finger Theorem   Question 2 Write a C program for implementation

Deletion of any element from the queue, Program segment for the deletion of...

Program segment for the deletion of any element from the queue delmq(i)  /* Delete any element from queue i */ { int i,x; if ( front[i] == rear[i]) printf("Queue is

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd