# Algorithms

## Course Pages with Lecture notes

Duke University’s CPS130 –Introduction to Design and analysis of Algorithms is an undergraduate course. The lecture notes are good for revising basic concepts.

Jeff Erickson’s Algorithm course materials –this is a huge collection of lecture notes, homeworks and
exams all in one big document (800+) pages. The tone is conversational, which helps to get a feel of the *langauge* of the subject. This is a graduate level
course.

MIT’s Mathematics for Computer Science – 6.042J, has exhaustive notes on Discrete Mathematics.

## Video Lectures

- Algorithms by Omkar Deshpande on YouTube. Detailed explanation of concepts.

## Articles

## Interviews

## Books

### Free

- Algorithms by Vazirani et. al
- Lisp, the Universe and Everything: “Programming Algorithms” Book Work in progress (as of Jan 2020). All the algorithms and data structures are explained using Lisp.

### non-Free

- Introduction to Algorithms aka CLRS (affl.) – the standard textbook for this course in large percentage of undergraduate and graduate classes. The book weighs a ton and looks intimidating, but is quite approachable in practice.

## Topics

### Preliminaries

### Probability and Randomness

### Dynamic Programming

Divide and conquer algorithms partition the problem into disjoint subproblems, sovle the subproblems recurisvely and then combine their solutions to solve the original problem.

Dynamic programming algorithms apply when the subproblems overlap –ie., when subproblems share subproblems. Dynamic program solves each subproblem just once and saves the answer, thereby avoiding the recomputing the answer.

DP is typically applied to *optimisation problems*.

Four steps of DP algorithm:

- Characterise the structure of an optimal solution.
- Recursively define the value of an optimal solution
- COmpute the value of the optimal solution, typicall bottom-up.
- Construct an optimal solution from computed info.

//Characterise the structure. Define the Value. Compute the Value. Construct.

#### To Read

2013-11-01: Towards a discipline of experimental algorithms by Bernard Moret.

2013-11-01: O-notation considered harmful (use Analytic Combinatorics instead)