Problems 1. Modify SiftDown to have the following specification. proc SiftDown (L,U) pre Неap(L+1,U) post Heap(L,U) What is the run time of the code? Show how it can be used to construct an N-element heap in O(N) time, and thereby a faster Heapsort with the follow- ing structure. Step 1 ? Heap Step N Heap Sorted Step 2N (Not only is this Heapsort faster than the one in the text, it also uses less code.)

Problems 1. Modify SiftDown to have the following specification. proc SiftDown (L,U) pre Неap(L+1,U) post Heap(L,U) What is the run time of the code? Show how it can be used to construct an N-element heap in O(N) time, and thereby a faster Heapsort with the follow- ing structure. Step 1 ? Heap Step N Heap Sorted Step 2N (Not only is this Heapsort faster than the one in the text, it also uses less code.)

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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