Assigned: Monday, 4 October 1999
Due: 10:00 a.m., Monday, 11 October 1999
Summary: In this assignment, you will further ground your study of recursion and Big-O analysis.
Turning it in: Send me a printed copy of anthing you do.
Collaboration: You should work on this individually. You may discuss ideas with fellow students and request help debugging, but each of you should write up your own solutions.
Do problems 24, 27, 28, and 29 of Chapter 5.
Determine the running time (Big-O notation) of each of the following algorithms. Note that you may have to come up with an appropriate metric for the size of each problem.
Suppose you have N locations connected by sidewalks. To find the shortest path from location A to location B ... List all the paths from A to B Find the distance of each path. Take the smallest of all those values.
To find the smallest value in a collection ... Set smallestSoFar to one value in the collection While unchecked values remain in the collectoin Pick one If that value is smaller than guess then Set smallestSoFar to that value Return smallestSoFar
To find the smallest value in a collection ... If the collection has only one element Return that element Otherwise Split the collection into two equal halves Find the smallest value in each half Return the smaller of those two values
To find the smallest difference between any two different numbers in a collection ... Set estimate to ``infinity'' For each value, v, in the collection For each value, u, not equal to v If |u-v| < estimate then Set estimate to |u-v| Return estimate
It's probably not worth your time, but you can obtain extra credit by implementing any of the algorithms in part 2 of the assignment.
Monday, 4 October 1999
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