Programming Puzzles & Code Golf newsletter

Top new questions this week:

Make a "Ceeeeeeee" program

Once I wrote a JavaScript program that would take as input a string and a character and would remove all characters except for the first one and the character given as input, one by one. For example, ...

code-golf string

asked by Challenger5 56 votes answered by DrMcMoylex 23 votes

Shortest code to throw SIGILL

Background We already have a challenge about throwing SIGSEGV, so why not a challenge about throwing SIGILL? What is SIGILL? SIGILL is the signal for an illegal instruction at the processor, which ...

code-golf

asked by Mega Man 42 votes answered by ais523 57 votes

PPCG Jeopardy: Cops

How well do you know the site? Let's find out. This is a cops-and-robbers challenge. Robber's thread. As a cop, you need to: Find a non-deleted, non-closed challenge on this site to answer. The ...

cops-and-robbers obfuscation

asked by Nathan Merrill 38 votes answered by DLosc 8 votes

What will you bring for Thanksgiving?

Thanksgiving in the United States is coming up on November 24th. Many people will have a large dinner with their families, traditionally including turkey and many side dishes. This typically means the ...

code-challenge kolmogorov-complexity polyglot

asked by ETHproductions 31 votes answered by BlueEyedBeast 22 votes

Finding The nth Prime such that the prime - 1 is divisible by n

Problem The goal is as the title says to find the nth prime such that the prime - 1 is divisible by n. Explanation Here is an example so you understand the question, this is not necessarily the ...

code-golf number number-theory primes

asked by Ando Bando 31 votes answered by Emigna 9 votes

Goodness Giza Golf!

A "Giza number", also colloquially known as a Timmy Number is any number where the digits represent a pyramid (A134810). For example, "12321" is a giza number because it can be visualized like this: ...

code-golf math sequence palindrome decision-problem

asked by DrMcMoylex 31 votes answered by Dennis 25 votes

Cracking in progress

Remember those brute-force programs to crack password that show every combination they are trying? More precisely, at one point, the n first characters are fixed (they have been guessed successfully), ...

code-golf string random

asked by Dada 28 votes answered by Neil 12 votes

Greatest hits from previous weeks:

Don't google "google"

We all know that if you google the word "google" it will break the internet. Your task is to create a function that accepts 1 string and returns its length, in as few amount of Unicode characters as ...

code-golf string

asked by rybo111 128 votes answered by xnor 194 votes

The Programming Language Quiz

Congratulations to Dennis who won both the cops' and the robbers' challenge! Calvin's Hobbies has already delivered on his promise and wrote this challenge for Dennis for winning the robbers' ...

code-golf hello-world obfuscation cops-and-robbers

asked by Martin Ender 159 votes answered by Dennis 24 votes

Can you answer these?

Fewest disk writes to defrag multiple files

Introduction A disk is a linear container with blocks indexed 0 through size-1. A file is a named list of block indexes used by that file. An example filesystem is expressed like this: 15 ...

code-golf combinatorics

asked by spraff 8 votes

The Most Durable Pokemon Types

Background In Pokemon there are 18 types: Normal Fighting Flying Poison Ground Rock Bug Ghost Steel Fire Water Grass Electric Psychic Ice Dragon Dark Fairy ...

code-golf compression

asked by Devin White 5 votes