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Algorithms and Data Structures

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All things related to algorithms - including cryptography, data structures, competitive programming

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Learn Data Structures and Algorithms

Overview

This 28-part course consists of tutorials on data structures and algorithms. It alternates between tutorials and implementation, and you get to **implement every algorithm**. You can think of this course as a "Free Online Nano Book".

This course teaches algorithms and data structures f...

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Why do we need (efficient) algorithms?

Category: Algorithms and Data Structures

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Learn Bioinformatics

Overview

This list consists of ~10 tutorials to learn bioinformatics. You can think of this list as a "Free Online Nano Book". We'll cover important bioinformatics topics, learning (a) the biological significance of each problem, and (b) the computational algorithms used to solve the problem. Everything is 100% free.

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Conserver sequences and regulatory motifs are short sequences (say of length 15-30) which occur frequency in the genome. These sequences serve a variety of functions - such as regulating gene expression (and hence how much of a protein is produced) and indicating where genes begin. We'll see how to find these sequences using brute-force algorithms and randomized algorithms.

Recently, we've figured out cost effective ways of sequencing a human genome, i.e. taking a human genome and reading sequence of 3-4 billion nucleic acids (A, C, G and T) that it comprises of. In this section, we'll see how this is achieved. We'll also see how we can find similar regions in two different genomes, which allows us to do things like infer evolutionary history and predict protein function.

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DNA and Protein: What they are, and what role do they play?

Category: Algorithms and Data Structures

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Learn Python 2

Overview

Welcome to Commonlounge's Python Class. This is a 22-part course which will teach you Python 2 from scratch. It's designed to be very hands-on and will walk you through every step of the process. You don't need to have any previous knowledge of programming or Python!

The first few tutorials work on basic Python concept...

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Code Editor

Category: Algorithms and Data Structures

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Learn Cryptography: From Beginner to Expert

Overview

This course consists of ~25 tutorials to learn cryptography. You can think of this course as a "Free Online Nano Book". You'll learn cryptographic algorithms, including those currently in use such as the RSA algorithm (used for secure digital communication) and Digital Signatures Algorithm (used for digital signatures). Everything is 100% free.

This course starts out by describing what cryptograp...

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Syllabus

What is cryptography and what is it used for? What does a cryptosystem look like? What are its components, and who are the parties involved? What are its design objectives? What is the difference between symmetric key cryptography and public key cryptography? All of these questions will be answered in this section.

It's time to take a look at some simple cryptography algorithms. These algorithms are not used anymore since they are not secure, but each of them was used centuries ago for communicating sensitive information including military strategy during wars. Moreover, these algorithms are a great way to get started with cryptography because its possible to work out examples by hand, a luxury which modern algorithms do not provide.

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What is Cryptography? Why Cryptography?

Category: Algorithms and Data Structures

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What are the prerequisites for this course ? What do i need to know in Mathematics ?

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