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Unanswered Questions

81 questions with no upvoted or accepted answers
22
votes
0answers
512 views

Simplified Train Set

Many different types of train set exist, ranging from wooden tracks like Brio, to fully digital control perfect tiny metal replicas of real trains, but they all require a track to be designed, ideally ...
22
votes
0answers
1k views

Magic: the Gathering Combat Golf

Magic: the Gathering is a trading card game where, among other things, players play cards representing creatures, which can then attack the other player, or defend against the other player's attacks ...
20
votes
0answers
416 views

Halting Problem for Simplified Hexagony

Introduction Decide whether a Hexagony program composed solely of the characters .)_|\/><@ will halt using least bytes. Challenge Hexagony is a language ...
19
votes
0answers
481 views

Auto BATCH golfer

I love BATCH, despite its shocking lack of functional commands, despite even due to its lack of non-integer support. Why? Because this works: SET var=SET %var% i=0 ...
16
votes
0answers
185 views

Matrices Generated Using Rectangles

Input is an r by c matrix of non-negative integers (you may input r and c as other parameters if this helps with golf). This may be inputted as a 2D array or, if you prefer, a 1D array (though taking ...
16
votes
0answers
781 views

Complement a POSIX Extended Regular Expression

Given a POSIX Extended Regular Expression as input, output its complement (also a POSIX ERE). If the given regular expression matches a string, its complement should not match it, and the regex: ...
14
votes
0answers
327 views

Maximal discrepancy-2 sequence with minimal entropy

Background As noted in the PPCG challenge Compress a maximal discrepancy-2 sequence – which inspired this challenge – the authors of the paper Computer-Aided Proof of Erdős Discrepancy Properties ...
13
votes
0answers
196 views

Optimize Compiler for simple Reverse Polish Notation Programming Language

Description Imaginary programming language (IPL) uses Polish Reverse Notation. It has the following commands: i -- input number and push it to the stack o -- non-destructive output top of the stack ...
13
votes
0answers
409 views

Determine if a Graph is Toroidal

A simple graph is toroidal if it can be drawn on the surface of a torus without any edges intersecting. Your task is to take a simple undirected graph via any reasonable method (adjacency matrix, ...
12
votes
0answers
308 views

How to reduce EXE size of x86 ASM compiled with FASM?

As an exercise, I've created a simple solution for this challenge, in x86 Assembly Language. I'm running this with FASM on Windows. Here's my source code: ...
11
votes
0answers
335 views

Expand Sine and Cosine

Trigonometry has LOTS of identities. So many that you can expand most functions into sines and cosines of a few values. The task here is to do that in the fewest bytes possible. Identity list Well, ...
11
votes
0answers
604 views

Find a Glider Synthesis (Game of Life)

Challenge Summary In summary, the challenge is to provide the glider synthesis for a Game of Life configuration, which is your input. What does this mean? Well, firstly, let me explain a few terms. ...
11
votes
0answers
356 views

Hexasweep (part 1): The Solver

(This is part 1 in a two-part challenge.) Your task is to solve a Hexasweep puzzle. A Hexasweep puzzle is set out on a grid of diamonds arranged in hexagonal shapes, of which the board looks like a ...
11
votes
0answers
384 views

Resolve SAS macro variables

The SAS programming language is a clunky, archaic language dating back to 1966 that's still in use today. The original compiler was written in PL/I, and indeed much of the syntax derives from PL/I. ...
11
votes
0answers
576 views

Keep my Trip Cool!

Challenge Walking around Marks and Spencers, I noticed that they had air conditioning units placed randomly around the shop. Wanting to keep cool, I wondered what was the easiest way to move around ...

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