limefert.blogg.se - Brown cs15 doodlejump

#Brown cs15 doodlejump how to#
#Brown cs15 doodlejump software#
#Brown cs15 doodlejump code#

#Brown cs15 doodlejump how to#

Learn much more about how to find the runtime of these types of algorithms in CS16! Courtesy of Lina Sim, Mounika Dandu.can also drop log base (2) and say O(NlogN), since we can ignore constants.Thus, O(Nlog2N) – way better than O(N2).Each time you merge, you have to handle all the elements of the sub-arrays you’re merging, hence O(N).Each level of the tree performs n operations to mergeand sort the subproblems below it.Algorithmic “time” is measured in numbers of elementary operations.memory use may be even more important than runtime for embedded devices.

#Brown cs15 doodlejump software#

allows us to evaluate approximate speed of an algorithm independent of hardware or software environment.

inspect pseudocode and determine number of statements executed by algorithm as a function of input size.

average case is also important best case is interesting, but not insightful.

Bestcase requires least amount of work and is the best situation you could have

Averagecase is what will typically happen.

easier to analyze and important for unforeseen inputs.

In most of computer science, we focus on worstcaseruntime.

varies with input and typically grows with input size.

In analyzing an algorithm, runtimeis the total number of times "the principle activity" of all steps in that algorithm are performed.

How fast will Towers of Hanoirun relative to the number of disks?.

proportional to 2n – consider how fast this grows with n.

How fast will recursive Fibonacci(n) run relative to n?.

one algorithm could take 2 seconds and another take 1 hour to accomplish the same task.

less difference with small “n” but we care about large inputs.

n! will take exponentially longer as “n” increases.

Goal: to maximize efficiency and conserve resources.

This lecture: a brief introduction to Algorithm Analysis!.

much faster to search through list of CS15 students than list of Brown students.

number of elements in ArrayListto iterate through.Algorithm analysis is so important that it is taught at one point or another in every intro sequence!.can observe and analyze performance, then revise algorithm to improve its performance.performance matters when amount of data gets large!.Performanceof algorithm refers to how quickly it executes and how much memory it requires.You can learn a lot from experimenting on your own too.

#Brown cs15 doodlejump code#

For example, you can start by trying to get the pane to show up, then make something happen, then add another part etc.ħ) When in doubt about what a line of code can do, don't be afraid to start a blank java file just for testing it out.

Don't ever try to write the whole thing and try to get it to work in one run. If your problem is with calling functions other people wrote, you will no longer have such problem starting next assignment, as you'll be writing most of the code yourselfĦ) DO INCREMENTAL CODING! Test each method you wrote specifically before testing the whole program. You should start, get stuck, then go to hours/help sections.ĥ) The nature of the projects will begin to shift starting from Cartoon. Help section will help you most if you already know a great deal about the project. Note that there will be occasional design hints on piazza though and it is worth checking everyday.Ĥ) Don't wait for the help section before starting your project.

The lines at TA hours are not long at those time. When you have an assignment-specific question, try thinking about how to phrase it at a high level.ģ) Piazza are meant for clarification questions, and thus you will almost never get any direct solution for your project. If you know how to do something in high level, it shouldn't be too hard to get down to the specifics. Trust me, even those who seem really good at coding search these questions all the time as it's not necessary to remember all the syntaxes.Īgain, you are allowed to discuss with friends high level ideas. You are not supposed to search for a specific solution for your assignment on stackoverflow, but you can, however, search for the big ideas e.g. Unfortunately, the collab policy is as it is, so here is my suggestion as someone who has taken CS15 before: The projects for CS15 were not easy, even for those who have coded in Java before. It definitely takes some time to learn how to code.