Programming Puzzles & Code Golf newsletter

Top new questions this week:

Convert to and from the factorial number system

The Factorial Number System, also called factoradic, is a mixed radix numeral system. The factorials determine the place value of a number. In this system, the right most digit can be either 0 or 1, …

code-golf number

asked by Volatility 10 votes answered by beary605 6 votes

Number of holes in a polygon

The Problem: Count the number of holes in a connected polygon. Connectivity of the polygon is guaranteed by the condition that every triangle in the input triangulation shares at least 1 side with …

code-golf geometry

asked by Kaya 8 votes answered by WolframH 4 votes

quine-ish tic-tac-toe

Write a program in your chosen language which plays a perfect game of tic-tac-toe on a 3 * 3 board against a human player. However, every move has to be a different program, generated from the …

code-golf

asked by vsz 7 votes

Evaluate the primorial of a number

The primorial of a number is the product of all the primes till that number, itself included. Input a number from STDIN and evaluate its primorial. Don't use libraries. Shortest code wins.

code-golf arithmetic

asked by Soham Chowdhury 2 votes answered by Howard 1 vote

Generate Pascal's Pyramid

Pascal's Pyramid is an extension of Pascal's Triangle to the third dimension. Starting with a 1 as the apex, the elements of each successive layer can be determined by summing the three numbers that …

code-golf math

asked by Volatility 2 votes answered by Manishearth 1 vote

Evaluate the binomial theorem!

Your mission, even if you don't accept it, is to input three numbers from STDIN or file: 5 0.5 6 What you must do is evaluate this: (5a + 0.5b)^6 This basically means that the first two …

code-golf math

asked by Soham Chowdhury 2 votes answered by Kirilenko 0 votes

Greatest hits from previous weeks:

Fibonacci function or sequence

Write the shortest code that either: Generates a Fibonacci sequence (either in standard output, or as a stream) Calculates, given n, the nth Fibonacci number (I gave both options in case one is …

code-golf fibonacci

asked by Chris Jester-Young 24 votes answered by jtjacques 19 votes

The alphabet in programming languages

Our task is to, for each letter of the (English) alphabet, write a program that prints the alphabet, in a language whose name starts with that letter. Input: none Output: abcdefghijklmnopqrstuvwxyz …

code-golf

asked by Joey Adams 24 votes answered by Jesse Millikan 6 votes