Contents

Demo - introduction demo showing how to solve the tasks with this site.

Help - short help on usage this web-resource.

Languages - how to start and which language to learn first?

Sample - sample of solutions for Task #1 in several languages.

Proposing your own task - how you can participate in problem adding if you want to.

Copyright - info about project.

Other sites - popular web-resources with sets of programming problems.

Few articles on some algorithms, methods or data structures:

• Binary Heap - array-based tree-like data structure for building priority queues.
• Binary Search - binary search for arrays and functions.
• Caesar Cipher Breaking - by frequency analysis with the Least Squares.
• Checksum - simple checksum for arrays, used in several tasks.
• GCD and LCM - Greatest Common Divisor and Least Common Multiple.
• Introducing Graphs - about graphs, general terminology and usual ways to hold them in memory.
• Modular Arithmetic - properties of remainder for integer division.
• Number Guessing Game - famous game of guessing the value by "low-high" questions.
• Numbers to Digits - about conversion numbers to string using specific numeral system.
• Prime Numbers - on primes and simple method for generating them sequentially.
• Random Numbers - approaches to pseudo-random numbers generation.
• Standard Deviation - measure of remoteness of the set of numbers from their mean.
• Square Root Approximation - method of approximate square root calculation.
• Sorting Algorithms Comparison - discussion of popular sorting algorithms.