(a) Consider the following algorithm. Input: A non-negative integer n. (1) If n % 5 = 0, stop. Otherwise, go to (2). (2) Replace n by n + 3, and go back to (1). Prove that this algorithm terminates for every choice of the input n. 2.
(a) Consider the following algorithm. Input: A non-negative integer n. (1) If n % 5 = 0, stop. Otherwise, go to (2). (2) Replace n by n + 3, and go back to (1). Prove that this algorithm terminates for every choice of the input n. 2.
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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![2. (a) Consider the following algorithm.
Input: A non-negative integer n.
(1) If n % 5 = 0, stop. Otherwise, go to (2).
(2) Replace n by n +3, and go back to (1).
Prove that this algorithm terminates for every choice of the input n.
(b) Consider the following algorithm, in which
f(n) = n – 7n² + 14n – 8.
Input: An integer n.
(1) If f(n) = 0, stop. Otherwise, go to (2).
(2) Replace n by n² % 7 and go back to (1).
Prove that this algorithm terminates if and only if n is not a multiple of 7.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Ffdcbcdd1-e8c0-4785-bbe7-bc6d3a4f99de%2F8cc665b6-fe75-4a9e-a617-4e103187e0b8%2F016b005_processed.png&w=3840&q=75)
Transcribed Image Text:2. (a) Consider the following algorithm.
Input: A non-negative integer n.
(1) If n % 5 = 0, stop. Otherwise, go to (2).
(2) Replace n by n +3, and go back to (1).
Prove that this algorithm terminates for every choice of the input n.
(b) Consider the following algorithm, in which
f(n) = n – 7n² + 14n – 8.
Input: An integer n.
(1) If f(n) = 0, stop. Otherwise, go to (2).
(2) Replace n by n² % 7 and go back to (1).
Prove that this algorithm terminates if and only if n is not a multiple of 7.
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