CSCI-GA.1170-001/002 Fundamental Algorithms, Fall 2015
Lecturer: Prof. Yevgeniy
Dodis, dodiscs.nyu.edu, (212)
998-3084, room 413, WWH. Office hour: Tuesday 3-4pm
Meeting Time/Place: Tue 5-7, room 109, WWH.
Recitation Time/Place: Thu 5-6, room 109, WWH.
Recitation Leader: Masha Pershina, pershinacs.nyu.edu,
719 Broadway, Room 713.
Tutor:
Laura Florescu, florescucs.nyu.edu,
(212) 998-3073, Office hours: Mon 2:30-3:30pm, Wed 7:15-9:15pm, Thu 7:15-8:15pm, room 412, WWH.
Midterm: Tuesday, October 27, in class.
Final: Tuesday, December 15, 5:00-7:00PM, Room 109, WWH.
Mailing list: To subscribe to the class list, follow
instructions at
To post a message to all the list members, send email to
csci_ga_1170_001_fa15@cs.nyu.edu. Please, post only messages
interesting to everybody taking the class. Specific class-related
questions and most of your other correspondence should be directed to
the tutor or the instructor.
Course Homepage: http://cs.nyu.edu/courses/fall15/CSCI-GA.1170-001/index.html
Additional Handouts:
Problem Sets:
- Homework 1: (due Sep. 15).
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- Homework 2: (due Sep. 22).
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- Homework 3: (due Sep. 29).
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- Homework 4: (due Oct. 6).
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- Homework 5: (due Oct. 14).
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- Homework 6: (due Oct 29).
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- Homework 7: (due Nov. 10).
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- Homework 8: (due Nov. 17).
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- Homework 9: (due Nov. 24).
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- Homework 10: (due Dec. 1).
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- Homework 11: (due Dec. 10).
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- Homework 12: (due Dec. 14, 11AM).
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Brief Course Description:
This is an introductory course in algorithms. We will cover standard
topics such as sorting, divide-and-conquer, various data structures,
graph algorithms, dynamic programming, greedy algorithms, and - time
permitting - some special topics (e.g., online algorithms). The
emphasis will be given to arguing the correctness of algorithms and
performing the analysis of their running time.
Textbook:
Introduction to Algorithms by Thomas H. Cormen, Charles
E. Leiserson, Ronald L. Rivest, and Cliff Stein, published by MIT
Press.
You can get either the THIRD EDITION (recommended) or the
SECOND EDITION. The
exercises will refer to the THIRD edition.
Grading:
There will be one in-class midterm and a final exam, in addition to
approximately weekly homework assignments. Tentative grade split is
40% homework, 25% midterm and 35% final exam. Students on the "boundary"
between two grades can increase their grade by doing accurate self-grading,
as explained below.
Homework:
Each problem set will consist of several problems. Some of the homework exercises will be routine, but others will be more challenging. I do not expect you to solve all of the homework problems, but I hope that you will benefit from working on the more difficult ones. Homework will be assigned the day of the class, and will be due the following week (unless stated otherwise). No late homework will be accepted. The solutions will be discussed during the recitation of the week the homework is due. We encourage the students to come to the recitation - not only for the homework solutions, - but primarily to see examples of the problems similar to those assigned for the following week.
The maximum point value for each problem (and, sometimes, parts of the problem) will be stated on the homework. Some questions in the homework will be for the extra credit, and will be explicitly marked as such (together with their maximum extra credit) on each assignment. Solving such problems can make your overall grade for the homework above 100%, or, alternatively, effectively "erase" the credit lost for not solving some of the required problems.
Each problem in a given problem set must be written on a separate, one-sided 8.5x11 sheet of paper, with the student's name, homework number and problem number on top. If several such sheets are required for a given problem, put your name, homework number, problem number and "page number out of …" (starting from 1) on each such sheet. For example, if your name is John Doe, you are solving Problem 3 of Homework 5, and the solution required you to use three sheets of 8.5x11 paper, the second sheet should have "John Doe, Homework 5, Problem 3, page 2/3" on top. (If only one sheet is required, no need to put "page 1/1", it is the default.)
Only staple sheets with the same problem, do not staple
different problems, as we will be collecting each problem
separately. We encourage, but do not require, the students to type
their solutions. This is much easier to grade and edit, and much
harder to lose. In particular, while Microsoft Word or other such
editors can be used (and are already better than hand
written solutions!), we suggest to use Latex, and will provide a latex
file for each homework (where the students need to replace "stars"
***** by their solutions). Students are welcome to look at this
short Latex
tutorial for some useful pointers.
We also suggest that you make copies of your homework before
submitting the hard copy.
In fact, you are welcome (but not
required) to email a .pdf file with your solution to the
Tutor in addition to (not instead of!) the hard
copy. Make sure you use subject line "FA15 solutions: homework
number, your name" if you follow this option. This will protect
against (unlikely) loss of your homework (of course, if you type your
solutions, this is automatically done!), and will be useful for grade
disputes. Making copies is also useful for self-grading, as
explained below.
Self-Grading:
Another way where copying homework is useful is
for self-grading. In particular, after the students
handed in their homework and learned the correct solutions during the
following recitation, but before getting back their graded
solutions, the students can hand in their self-graded homework, using
the same grading system they expect from the actual graders. Unlike
regular homework, self-graded homework should only be submitted by
email to the Tutor. Make sure you use subject line "FA15
self-graded: homework number, your name" if you follow this
option. We believe self-grading their own mistakes will greatly
improve the students' understanding of the material. Moreover, as
explained above, students on the "boundary" between two grades might
increase their grade by doing accurate self-grading.
Concluding Remarks:
- Respect the Format. As explained above, we require
particular format from homework submissions. Please read/understand it carefully, and make sure you follow it to avoid unnecessary score penalties.
- Start early. Most problems will not be hard,
but others will be. Such more difficult problems are not
typically solved in one sitting. Start early and let the ideas
come to you over the course of a few days.
- Be rigorous. Each problem has a (sometimes
unwritten) requirement that you prove your algorithm
correct and analyze its running time. To obtain full
credit for a problem, it is necessary to fulfill these
requirements. We expect real proofs and real analyses, not
"proof by hand waving."
- Be concise. Express your algorithms at the
proper level of detail. Give enough details to clearly present your
solution, but not so many that the main ideas are
obscured. English is often a good way to express an
algorithm; pseudocode is good for communicating complex control
structure.
- Collaboration? You are encouraged to
solve all the homework questions on your own, but are
permitted to brainstorm difficult problems in small
groups, as long as each of you writes the solutions
individually and honestly acknowledges the cooperation.
Needless to say, if you work with others but never come up with
the solution on your own, you may do OK in the homework
component of your grade, but you will suffer on exams, so be
careful.
- Bibles? Help? More or less, you are only
allowed to use the textbook and your lecture notes. In
particular, the use of internet, course bibles, outsiders, and
other clearly "cheating" resources is strictly prohibited.
Please talk to me if you are having
problems keeping up with the material.