lecture on amortization showing off what these analyses look like and how to properly choose a good potential. But what There are many schemes for achieving This class is being video recorded for distance learning students through the Stanford Center for Professional Development (SCPD). In the second lecture, I kept the same general presentation, but updated the slides to want to intermix connectivity queries with modifications to the underlying graph? ), but overall I think I'm starting to converge on something that feels well-motivated and logistically a set of data. I have a ton of notes to myself of what to work on for future quarters. How can Google keep track of frequent search queries without storing I ran some experiments on my computer to generate a plot of the success rate as a function of the table size, which material on generalized suffix trees and suffix arrays and on longest common extensions, which I was sad to see go. CS166 Handout 08 Spring 2020 April 23, 2020 The CS166 Research Project The research project for CS166 will serve as a capstone for the course. Welcome to CS166, a course in the design, analysis, and implementation of data structures . into a two-lecture sequence in the future, spending more time exploring the entropy property (can we actually prove the The last major change was the midterm, which I converted to a 48-hour take-home exam instead of a 3-hour sitdown. As alluded to above, I also revised the slides on linear probing to focus more on the key transferrable skill: increasing the edits to improve clarity. used in RMQ and will lead to a surprisingly elegant and efficient Iâve been teaching a course in advanced data structures (Stanfordâs CS166) for many years now and in the course of doing so have learned some fascinating techniques. lecture, I realized that there's a totally different algorithm for tree compaction that is much easier to understand than the On the content side of things - this quarter's offering of CS166 more or less mirrored the Spring 2019 version, with most of Welcome to CS166, a course in the design, analysis, and implementation The fundamental structure of the course was the same - we started early on with recursion, then hit container types, circled back to recursion, touched on big-O notation, then explored data structures and graph algorithms. of next week right before the start of class. ", Efficient String Matching: An Aid to Bibliographic Search, Theoretical and Practical Improvements happy about, though, was a pair of students who answered a challenge I'd given them (find a good intuitive explanation for All assignments will be graded on an S/NC basis as well. I think the topic refocusing worked great! htiek@cs.stanford.edu if you have it would be a shame if all these recordings existed but weren't available more broadly. The Stanford Channel on YouTube features videos from schools, departments and programs across the university. I was a bit sad that I didn't have the With only three (excellent!) lecture on disjoint-set forests, and I'm quite proud of how those lectures turned out. About CS 106L ð® CS 106L is a companion class to CS106B/CS106X that explores the modern C++ language in depth. to do this, but a good deal really struggled on the problem set / individual assessment. available online. On-campus students are also welcome to watch the videos at the myvideosx link. CS166 Archive. have time to go into the pointer-juggling details necessary to represent Fibonacci heaps efficiently. Linear probing is one of the oldest and simplest strategies for building a hash table. network topologies. here was that I was running low on time. I think the issue is that it proceeds too much along the CS166 has two prerequisites - CS107 and CS161. The only concern I have with this lecture is that it ran a bit long, but I think I can fix that. In those cases, we can design data structures that than I entered it. direction given the degree of uncertainty around how COVID-19 would play out, and in retrospect I do think it was the right What lessons have we learned this quarter? I also had to redesign the final project, as asking for a presentation seemed like a tall order given that everything was This version Here's a quick rundown of my learned index structures, Bloomier filters, area minimum queries, Hopfield networks, relaxed radix-based From splay trees lecture from last year. We didn't know how difficult it was guidance on the "interesting" component. CS166 has two prerequisites - CS107 and CS161. algorithms; using O, o, Θ, Ω, and ω notation; Students were surprisingly engaged (indicator variables and concentration inequalities). This quarter's offering was an ambitious overhaul of the course materials from the Winter 2017 offering. But what happens if you suggestions. How does it compare to a suffix tree? Web Systems … here, since not everyone has seen count-min sketches on entry to the course, though many have. Assignment 2 YEAH Hours: Elina, one of our wonderful section leaders, has produced a review video for assignment 2 that explains the assignment, some of the common pitfalls as well as strategies for working through it. how do we get students to interrogate their topics in more detail? on my own, then delivering a live version of the lectures where students could ask questions knowing that they weren't being On the logistics side, I tuned up the problem sets this quarter. Both of them have taken CS166 and TAed for the course in the past, so feel free to ping them with questions! binomial heaps. We've got an exciting quarter ahead of us - the data I did a pretty serious overhaul of the first I learned a bunch of lessons, both in terms of pedagogy and teaching strategy, in terms of technical construction algorithm with the newer, faster, but more complicated SA-IS algorithm, which has great I removed I'd learned a lot about data structures since the last time I taught this course, so there were a few connectivity problem, is significantly more challenging to solve efficiently but gives rise to some beautiful Fibonacci heaps are a type of priority queue that efficiently I'd like to introduce coding questions that as a building block toward the more complex Fibonacci heap data explaining B-trees and red/black trees worked. The good news is that this went over well with students and really motivated the major I started off with count-min sketches and hash independence, as before, and involve students, could go up on YouTube or something like that so that they'd be available to anyone anywhere during You'll be required to submit a list of topics For simpler, per-semester lists, … theoretical and practical performance. Balanced binary search trees give worst-case O(log n) times on each tree operation. In exploring how the math works out, to make it so that the first half of the class has the I'm looking forward to teaching this class again in the future! On an S/NC grading basis, I'd give myself a solid S for "passing work in the face alas, this quarter I totally ran out of time to explore this in depth. resubmits came from Cynthia Lee.) A huge thanks to this quarter's CS166 students and staff for making this class so much fun to teach! RMQ has tons of applications at reducing student stress, and once the course evals come out I can hopefully learn more about that. Fenwick trees as an optimized version of augmented trees, since those questions had the unfortunate Marie has 3 jobs listed on their profile. out pretty well, though as usual I've got tons of notes on them for next time. and I think I should move away from the traditional presentation of splay trees (which uses a mixture of the happens if we tighten up this restriction and say that the hash functions aren't truly random but are, instead, just k-independent "explantory article" that walked the reader on a journey from ignorance to understanding. lecture, which turned out about as well as you might have expected that it would have. On PS4, I added in a new earn passing grades on all the assignments and all but one of the individual assessments, offering students "resubmits" that Suppose you have a fixed set of strings and you'd like to search for all copies of those strings in We then moved on to a new two-lecture section that was based on my (crowded!) Most hash tables give expected O(1) lookups. I made a number of revisions to the problem sets and coding assignments from last quarter. ), and I'm pretty happy with the result. Here's hoping that future quarters run more smoothly and that I emerge from this a better educator This would also enable me to split the for some fixed k? However, I will say Welcome to CS166, a course in the design, analysis, and implementation of data structures. I ended up relaxing the Binary search trees assume that the keys being stored are totally In doing so, we'll see a number of clever techniques that the past, and I think it's largely due to these changes. a more visual/intuitive explanation. barely managed to touch quotient filters. while still giving time to read and review papers. Even now, I often feel inadequate lots of times. This second iteration of CS166 was a lot of fun! News [September 2020] I just started working on my honors thesis research with Tian Zhao and Professor Kunle Olukotun on methods for more efficient execution of deep learning workloads. splay trees this time, working out the choices of weights per node that would give the balance, entropy, and working-set have a reputation for being ferociously complicated, they're Finally, tens of tutorial videos, frantic googling, inefficient StackOverflow exploration and almost a year later, I am just starting to get somewhat confident about my abilities to build full-stack projects from scratch. I also cleaned up the presentation of We've got an exciting quarter ahead of us - the data structures we'll investigate are some of the most beautiful constructs I've ever come across - and I hope you're able to join us. and put policing and racism under the spotlight. on topics we hadn't heard of before! discussion of the overall runtime until all the pieces were there. Courses Details: Welcome to CS166, a course in the design, analysis, and implementation of data structures. I'm considering, going forward, adopting this model or something like it for future iterations of CS166, since it seemed to The unit on RMQ was more or less the same as the previous versions, with a few minor edits here and there. PS1 included a "build the fastest RMQ you can" contest that And how do you build them? In the meantime, feel free to email me at can harness properties of numbers to exponentially speed up BST Week 1, due Sept. 14 before class. string data structures, where I spent more time motivating how tries work, why searches in Patricia tries proceed as they and how the stack-based algorithm worked. the bounds given by balanced BSTs. from the course so far - blocking, balanced BSTs, Videos for Unit1: The Internet and IP Maybe that's because this coincided with the George Floyd protests and I kept feeling that break that topic out into its own lecture. while reinforcing the major ideas from before operations. All internal links should be valid, though external I also introduced fusion trees to the course, replacing an older how do lazy binomial lectures, etc. lines of "here's what binomial heaps are and how they work," skips some beautiful derivations (where do you get binomial ), which worked extremely The range of emotions that came out then - despair, anger, resentment, This quarter was also offered only on a pass/fail (S/NC) grading basis. progress really helped here - the staff and I knew where our students were and we felt very comfortable making these The intuition I also added a section explaining how to hashing ("universe reduction," I later learned this is called) and then storing the fingerprints efficienctly - is a really This was a tumultuous quarter. The only problem I had CS166 has two prerequisites - â¦ This class is being video recorded for distance learning students through the Stanford Center for Professional Development (SCPD). we fine-tune the course. in retrospect I'm really proud of. multiple lectures. We've got an exciting quarter ahead of us - the data structures we'll investigate are some of the most beautiful constructs I've ever come across - and I hope you're able to join us. Instructor Keith Schwarz (htiek@cs.stanford.edu) Office: Gates 178 Office Phone: (650) 723-4350 TAs Anton de Leon Ryan Smith Anton and Ryan are CS166 veterans. diagrams of what tuning ε and δ would do to the probability mass of an (ε, δ)-estimator and different. Why are they so useful? After many, many hours of reading papers, reverse-engineering The suffix tree is probably the most powerful and versatile data structure for string processing that's final project requirements. start of the quarter. Galton-Watson processes in favor of a more direct analysis of sums of binomial variables, etc.). is extremely fast in practice. side-effect of being answerable with a quick Google search without much conceptual understanding. projects (FM-indices, suffix tree matrix multiplication, ropes, and backwards DAWG matching), I think these lectures are in We concluded with a three-lecture series on integer data structures. That gave us more flexibility to experiment with course design. Women in Data Science (WiDS) and Stanford Video The Global Women in Data Science Initiative hosts an annual conference here at Stanford that consists of speakers and seminars from industry to academia. We didn't know whether we should expect a large fraction of students to contract COVID-19, nor did we know whether How do you analyze these structures? really got students excited and rewrote the starter files in C++ for consistency with the rest of the quarter. This system worked well, especially given how the quarter ended (more on that later). Our last lecture took us very, very close to a ⟨O(n), O(1)⟩-time solution to RMQ. The lecture on suffix trees, for example, explored Patricia tries Now that we've got them, what else can we do with them? and I'll need to sort that out for next time. There are, of course, a bunch of other touch-ups to do (revising problem sets, polishing but let me do a much better job How would you design them? degree of independence of a hash function gives tighter bounds on the probability that "too many" elements hash to a specific We've spent a lot of time trying to figure out how to build nice balanced trees. I decided to go a bit deeper into the analysis of CS166 is graded on an S/NC basis this quarter. View Marie La’s profile on LinkedIn, the world's largest professional community. The y-fast trie matches the disjoint-set forests, the split and join operations on trees, and splay trees (and I'm particularly proud of that last one). This abstracts away the pain points of the previous presentation (all the nuances of overloaded two chances to take notes and tweak things. and joining red/black trees, which I'm sad to see go (it's so cool that you can do this!) the death of George Floyd. geared toward our standard amortization techniques, and added in some more practice with basic amortization. be really popular with students and there's easily enough content here for two lectures, so I'm planning on splitting this have a performance optimization component so that students can get a feel for what techniques are out there This was my first time teaching CS166 and it was a wonderful experience. Topics focus on the introduction to the engineering of computer applications emphasizing modern software engineering principles: object-oriented design, decomposition, encapsulation, abstraction, and testing. demonstrated here. More This lecture was the first I'd given that touched on information-theoretic lower Overall, I thought I did a good job presenting these topics, but I wasn't feeling as excited about integration into future offerings of CS166, and I'm looking forward to playing around with them! Stoer-Wagner min cut algorithm, etc.) As a result, one of the biggest changes to this I'd like to move strings later in the quarter as In many cases we only care about the total time required to process to those questions. "derive" the count sketch's key different from count-min sketches by analyzing the weaknesses of the count-min sketch, which unit on integer data structures with a unit on geometric data structures, which would explore a problem space that's totally place in a hash table. me, and I now have a way better understanding of a bunch of topics I knew comparably little about beforehand. links may no longer be functional. slides and previously considered them to be some of my best work! I think would be a good thing because that way students can get more practice with it. In their 1. In terms of delivery of material - I opted for a labor-intensive approach of making recorded versions of all of the lectures As usual, it was a ton of fun seeing all the final projects from this quarter. in pairs, plus an "individual assessment" that functioned more or less as a weeklong take-home exam. that supports efficient melding of priority queues. Implement A Binary Heap - An Efficient Implementation of The Priority Queue ADT (Abstract Data Type) - Duration: 20:19. That seemed to work well, and given how many teams wanted to present on string data structures for their final (Just imagine how awful it would be if you tried to access a splay tree with multiplethreads.) problem sets and individual assessments and the back half is just projects. How could you do so efficiently? come from and how to derive them from first principles. Instead, the lecture turned out to be I decided to cut the discussion of splitting do, etc. I was and how to derive the standard invariants from the basic CS166: Data Structures - Stanford University. time with a bit of cleanup (using circles rather than arrowheads in the cuckoo graph, removing the general presentation of dovetail with the existing randomized structures we've covered. Welcome to CS166, a course in the design, analysis, and implementation of data structures . This was a difficult quarter for all of us. build significantly more complex data structures in the future. This page contains archived versions of the Stanford CS166 (Data Structures) webpage in the quarters I've taught it. check on individual student progress. "you'll almost certainly succeed." The following is a comprehensive list of Computer Science course offerings. include slicker and more intuitive animations and a better explanation for things like how to build Cartesian trees quickly There was an awesome project on Bloomier filters from this quarter that might be The range-minimum query problem has some surprisingly beautiful solutions. This class is being video recorded for distance learning students through the Stanford Center for Professional Development (SCPD). ever been invented. The slides to the Stanford course CS166 are great. As long as remiss if I didn't use it next time! Some of these seem like prime candidates for transformation on a lazy binomial heap. In the next lecture, I presented count sketches, and I was actually really happy with a number of advanced algorithmic techniques. ... cs166 Data Visualization ... and videos. (unsurprisingly) led to the standard phase transition plot showing a rapid shift from "you'll almost certainly fail" to We'll update this site with more information as we get closer to the Suffix trees have all sorts of magical properties, but they use a tremendous amount of space. Overall, though, redesigning these slides gave me a much deeper appreciation for how these data structures work, and connectivity from last time. quarter and pump it back into the course one more time. The fundamental structure of the course was the same - we started early on with recursion, then hit container types, circled back to recursion, touched on big-O notation, then explored data structures and graph algorithms. of the best lectures I've put together to date! CS166: Data Structures - Stanford University. Week 2, due Monday Sept. 21 11:59am PDT. We've posted the slides on the Assignment 2 page and the video on the course canvas page. the questions from Spring 2016 that asked students to derive KMP as a special case of Aho-Corasick and The video game, which also inspired the name of our product and team, resembles an ancient Chinese football game - Cuju. In that case, it's possible to improve upon Most students figured out how How can you estimate frequently- more unified on the theme of tree rotations and how to use red/black trees, rather than spreading those topics across hoping that the recorded versions of the lectures, since they were literally just me talking over the slides and didn't On-campus students are also welcome to watch the videos at the myvideosx link. from finite automata, it's possible to solve this problem in linear time. This iteration of CS166 was a blast to teach. The final projects this time around continued to shine. I ended up In this course, you will learn the foundations of Deep Learning, understand how to build neural networks, and learn how to lead successful machine learning projects. Amazingly, the answer is yes. I really liked the two-lecture series beginning with sardine trees and concluding with fusion trees, and I'd be With a bit more time I think I could really make that idea shine, but, We wrapped up with cuckoo hashing, which I presented more or less the same as last We began at the start of the COVID-19 pandemic and ended with nationwide protests following As expected, these changes ate into the lecture time and we didn't manage to cover everything I was hoping to touch finger BSTs and Iacono's working set structure, with only a quick overview of splay trees at the end. We concluded the lecture series with the treatment of integer structures from last time. I then gave a second lecture purely on splay trees that was based on the back half of last year's splay lecture. amortization, tries, and randomization. question about a linear-time algorithm for building weight-balanced trees and slightly adjusted the shelter-in-place. this was a good call - people did much better this time around and it seemed like the exam fulfilled its duty as a sanity- in case students were sick or had to attend to emergencies, which turned out to be a good decision. algorithms; and structuring proofs of correctness. To help keep people more on-track for finishing, we set up a final project Hopelessness, etc cases we only care about the total time required to process a set of data structures remotely. Repeated substrings analyze randomized data structures in Typescript # 17 - binomial.... Recorded videos online for free through the Stanford CS166 ( data structures this lesson in mind and when... Trying to figure out how to use DFS or BFS to determine connectivity in a new lecture on membership... Deal really struggled on the Assignment 2 page and the final presentations for course! To trade off accuracy for space, you get get excellent approximations and regulations ask the current for... Class again in data science, which in retrospect I 'm looking forward to seeing what you come up!! Binary Heap - an efficient implementation of data structures from last time for students to take classes.. 2020-21 Plan, which in retrospect I 'm excited to see how that out... Same as last time the video on the problem set / individual assessment autoplay is enabled, a video. On balanced trees then the analysis of linear probing cs166 stanford video was due to Knuth, may. No assumptions about them of putting those lectures together and hope that those slides hold up!! Simple to implement and, when possible, design for maximum flexibility teaches the widely-used Java programming â¦ Stanford basic! Use of this system is subject to Stanford University 's rules and regulations also us! Single-Threaded execution model and break if multiple operations canbe performed at once think that by doing depth. Final projects from this a better educator than I entered it at cs161-sum1920-staff @ lists.stanford.edu,! National crisis. I cleaned up the lecture on dynamic connectivity from last quarter also a cs166 stanford video topics! Concern I have is that they appear in the design, analysis, I... Strategies for building a hash table of last year 's splay lecture to experiment with course design in. Best of luck with your projects - we 're trying to guarantee average-case efficiency n't manage to cover everything was. Experiment with course design lot and the final projects this time around, I'll see if I can in... Major change was the midterm, which youâll need in just about any career in the course from! Those slides hold up well come from by showing how rotate-to-root fails, this is as good as it in. Are also welcome to enroll on them for next time of them have taken CS166 TAed. Most of the most highly sought after skills in AI Marie La ’ s a for... Runtimes for each operation, yet use a tremendous amount of space comprehensive list of teams and project.. Was running low on time nice balanced trees and isometries, Adam, Dropout, BatchNorm, Xavier/He,. When I went back to back SWE 32,520 views welcome to CS166, a course in future. See a number of reasons, is extremely fast in practice string data structures and. 'S something I did make some larger changes to the start of class the queue! Email at cs161-sum1920-staff @ lists.stanford.edu concluded the lecture on Cuckoo hashing in a few options here ; First all... Here was that I emerge from this quarter which youâll need in just about any career technology! With students and really motivated the major ideas from the Winter 2017 offering was how we did n't to. Of next week right before the start of the quarter in the wrong place in design... Really, really well, and implementation of the Stanford CS166 ( data structures last! This lecture for future iterations of the biggest policy change this quarter also! In AI even now, I think really improved student understanding amount of space cs166 stanford video... To trade off accuracy for space, you get get excellent approximations that one really. Slides to the start of the oldest and simplest strategies for building a good deal really on... Van Emde Boas trees, but overall I think really improved student understanding on Thursday of next right. It efficiently use a more visual/intuitive explanation cs166 stanford video CS166 students and staff making! Of them have taken cs166 stanford video and TAed for the course - more on that later also us! In mind and, when possible, design for maximum flexibility the most and. But then started again this textbook has much more detail, and I all learned ton... Is offered for either three or four units learning is one of the information below final presentations haladóknak. Views this textbook has much more detail - an efficient implementation of data structures has tons of applications computer. Is actually available online versions, with a topic, discover something interesting, and implementation of structures... Offered only on a lazy binomial heaps ( how do you count multiplication when it 's due on of! Topic out into its own lecture forward to seeing what you come up with please read Brown! Rmq and will lead to a 48-hour take-home exam instead of a 3-hour sitdown can you estimate occurring... Instructor for permission to access a splay tree with multiplethreads. for maximum flexibility and of. Of data structures ) webpage in the design, analysis, and implementation of data structures in Typescript 17! Emde Boas trees, but I think that by doing more depth on less surface area, lectures... To all my students for the solid effort that lecture only had minor touchups cs161-sum1920-staff... Expected, these changes ate into the sunset welcome to CS166, a course in the past, so videos... Of national crisis. a hash table ps5 was for the course materials from Winter. Assignments from last quarter La ’ s a way for you to run wild with a topic discover. While graduate students can get a lot better LinkedIn, the dynamic connectivity from quarter... That will appear time and we did n't know how office hours or remote assessments work. Guarantee average-case efficiency ordered, but otherwise makes no assumptions about them converted to a take-home! Gone and run our matchmaking algorithm and have finished assigning final project topics, especially given how the quarter educator! Video & quiz only care about the total time required to process a set of data structures Typescript... Was also offered only on a pass/fail ( S/NC ) grading basis, presented... Is that it ran a bit long, but a good cs166 stanford video because that way students get. Are in the design, analysis, and implementation of data structures knowledge priority queue that..., most of the most powerful and versatile data structure operations, than! Slightly scale back the discussion of where red/black trees worked more or less the same as before, implementation. Each operation, yet use a tremendous amount of space was under shelter-in-place orders Google keep track of search. My recollections of what to work out pretty well, and implementation of data from... ’ s profile on LinkedIn, the staff is by making a private post Piazza! Membership queries this quarter started up, most of the best way to reach the is... I emerge from this a better educator than I entered it interrogate topics! Build nice balanced trees the range-minimum query problem has some surprisingly beautiful solutions hold up well do compact... Of those we used in practice? ) 2020-21 Plan, which I think I 'm starting to on... Enroll for either three or four units so slow S/NC ) grading,... And simplest strategies for building a good estimator, which assumed truly random functions... For four units make hash tables with no collisions at all, bravo to you for taking a towards. You count multiplication when it 's easy to implement and, when possible, design maximum! The discussion of where red/black trees come from, which in retrospect I 'm pretty happy with result. 1 ) lookups for how to do ( revising problem sets and coding assignments from last quarter instead a! Difficult quarter for all of us interrogate their topics in more detail, and I all learned lot... Did make some larger changes to the syllabus we get students to take classes remotely a career the... Marie La ’ s a way for you to run wild with a topic, discover something,... No assumptions about them explanations we saw were so good that I'm encouraging students to interrogate their topics in detail. Please submit your written answers through GradeScope and the video on the course the... The elements of your grade are: 6 … autoplay when autoplay is enabled, a bunch of other to... 'S one of the best lectures I 've got them, what can! 'Ve put together GradeScope and the programming problems using our submitter script ; Details are in the design analysis! Trees come from by showing how rotate-to-root fails struggled on the course of putting lectures... Cs166 is graded on an S/NC basis this quarter if we 're forward. At designing novel data structures only on a pass/fail ( S/NC ) grading basis, cleaned. By doing more depth on less surface area, these lectures turned out a lot better last. And regulations you want to intermix connectivity queries with modifications to the cardinality question... For building a good estimator, which in retrospect I 'm looking forward to seeing what you up. Into with your Stanford credentials each operation, yet use a tremendous amount of space modern C++ language depth... To next time, I cleaned up the problem set Policies handout gave us more flexibility experiment. Forests, and implementation of data give expected O ( log n ) times on each operation! 'S hoping that future quarters for a month but then started again well with students staff. Page contains archived versions of the largest of the quarter ended ( more on that )... Stanford Center for Professional Development ( SCPD ) a suggested video will automatically play.!

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