MergeSort(A, p, r):     if p > r          return     q = (p+r)/2     mergeSort(A, p, q)     mergeSort(A, q+1, r)     // reorder array elements     mergeSort(A, p, r-1)

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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What is a recurrence relation for the following Mergesort algorithm?

MergeSort(A, p, r):
    if p > r 
        return
    q = (p+r)/2

    mergeSort(A, p, q)
    mergeSort(A, q+1, r)

    // reorder array elements

    mergeSort(A, p, r-1)

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