Pearson eText for C Programming Language -- Instant Access (Pearson+)
Pearson eText for C Programming Language -- Instant Access (Pearson+)
2nd Edition
ISBN: 9780137460847
Author: Dennis Ritchie, Brian Kernighan
Publisher: PEARSON+
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Chapter 1, Problem 21E

Write a program entab that replaces strings of blanks by the minimum number of tabs and blanks to achieve the same spacing. Use the same tab stops as for detab. When either a tab or a single blank would suffice to reach a tab stop, which should be given preference?

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(Dynamic Programming.) Recall the problem presented in Assign- ment 3 where given a list L of n ordered integers you're tasked with removing m of them such that the distance between the closest two remaining integers is maxi- mized. See Assignment 1 for further clarification and examples. As it turns out there is no (known) greedy algorithm to solve this problem. However, there is a dynamic programming solution. Devise a dynamic programming solution which determines the maximum distance between the closest two points after removing m numbers. Note, it doesn't need to return the resulting list itself. Hint 1: Your sub-problems should be of the form S(i, j), where S(i, j) returns the maximum distance of the closest two numbers when only considering removing j of the first i numbers in L. As an example if L [3, 4, 6, 8, 9, 12, 13, 15], then S(4, 1) = 2, since the closest two values of L' = [3,4,6,8] are 6 and 8 after removing 4 (note, 8-6 = = 2). = Hint 2: For the sub-problem S(i, j),…
(Dynamic Programming.) A group of friends is visiting a number of attractions located along a highway, starting at kilometre 0, placed at distances ɑ1 < A2 < ···
(Greedy Algorithms) Describe an efficient algorithm that, given a set {x1, x2, . . ., xn} of points on the real line, determines the smallest set of unit-length closed intervals that contains all of the given points. Argue that your algorithm is correct.

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