In the game of chess, there is piece called the queen that may attack any other piece that is on the same, row column or diagonal. In chess their are typically two sides, black and white, with each piece belonging to one of the teams. Pieces may not attack pieces belong to the same team.
You...
I'll try to keep this short... see these (relatively recent) questions for some background: 1 2 3
Disclaimer: I really hate 'untyped anonymous lambdas', and if we must have them, then we need some rules, but I think they don't make sense, and I think this is one formal way we can kill them forev...
Your task is to create a program that will take an input of multiple 4-choice questions (A, B, C, D) in the format shown below, display each question (format also shown below) and its 4 answer choices, get the user's answer to each question, and, at the end of the quiz, output their score as a pe...
Fibtraction - Fibonacci with subtraction
Introduction
The Fibtraction (as I call it) sequence is the Fibonacci challenge but instead of adding numbers, you subtract them.
The first few numbers of this challenge are:
1, 2, -1, 3, -4, 7, -11, 18, -29, 47, -76, 123, -199, 322, -521, 843, -1364.....
Cheat at code golf
code-challenge
The standard loopholes are a set of rules that answers must follow, lest they be downvoted. However, on this post, you are not allowed to downvote answers that use a standard loophole. Because that's the point of the challenge!
Your job is to find 3 things, an...
(This might be a duplicate of another question but all of its answers were vague nonanswers, and I can't find it again, so here goes...)
I like python3 and I'm quite good at it; it's rather verbose so when I make long scripts I have a tool script I import that contains lots of shortenings and pr...
My read on the current state of meta.CG opinion is that the use of libraries is acceptable and that the library call should count in the character count:
Use of built-in functions and libraries in Code Golfs
Using libraries in solutions
And from this discussion I conclude that there isn't real...
Using a non-free language on a Cops and Robbers challenge
Most (currently all) cops and robbers challenges consist of two parts:
A cop submission, where a user posts some secret property of a program, such as its output, a scrambled version of the code, etc.
Then, other users, the robbers, try...
Don't step on a crack, or you'll break your mother's back
code-golf number
Earlier I was walking down the sidewalk in my town, which is made of concrete slabs and looks something like this:
Note: not my sidewalk. Photo by Stephen Barnecut - Own work, CC BY 2.5
I decided to try to pace my...
Possible Duplicate:
How to look up a symbol?
How does one make the symbol for a blackboard bold kind square brackets ,something like [[.The symbol being talked about is used for containing formulas whose truth values are being talked about in propositional logic.
Thanks and regards
An ...
Introduction
This is the evolution of this previous challenge which was about checking satisfieability of normal formulae in conjunctive normal form (CNF). However, this problem is NP-complete and watching algorithms finish is just boring, so we're gonna simplify the problem!
Specification
Inp...
Two numbers are coprime if their greatest common divisor is 1.
Given a positive integer N, your task is to compute the first N terms of OEIS A061116, which is the sequence of positive integers higher than 1 that are coprime to all their decimal digits.
Here are the first few terms of the seque...
Background
A super-prime is a prime number whose index in the list of all primes is also prime. The sequence looks like this:
3, 5, 11, 17, 31, 41, 59, 67, 83, 109, 127, 157, 179, 191, ...
This is sequence A006450 in the OEIS.
Challenge
Given a positive integer, determine whether it is a...
Given a string and integer n, split the string at n character, and print it together
Ex)
laptop 3 should print lap top
laptop 2 should print la pt op (see how it splits the string at every 2nd char)
Special cases:
laptop 0 should print laptop (since we split at every 0th char, thus none)
l...
