# All Questions

10,365 questions
23 views

### Exploding Numbers

sandbox (deleted) Lets define a matrix of 9s as: $$N = \begin{bmatrix} 9&9&9\\9&9&9\\9&9&9 \end{bmatrix}$$ Lets define an exploding number as a number at position $(x,y)$...
29 views

### Build ASCII Podiums

In sporting competitions, it often happens that winners are presented on podiums, with the first-place person on the highest in the middle, the second-place person on the middle height to the left, ...
36 views

### Combining Array Transformations [on hold]

The problem is solve is taking two integer arrays and combing their transformations. A transformation is when one integer moves indexes. For example [0,2,1,3] would mean the second and third index ...
100 views

### Python code to produce C++14 hex integer literal with ticks

tl;dr? See bottom for The Competition Integer literals While programming, the 64-bit hexadecimal literal 0x123456789abcdefL is difficult to gauge the size of. I ...
963 views

### What have we got?

Inspired by, and in memory of, our beloved genius, He invented and implemented dfns — his magnum opus and the subject of the challenge. While not necessary for this challenge, you can experience a ...
238 views

### Left Center Right (LCR) code golf

At a party, I was introduced to the game LCR. Now it's not a great game as there's no skill but only random chance. But it got me thinking, I could code this, and I made a quick program in R to model ...
205 views

### 2-Dimensional Bubble Sort

Sorting makes no sense for a 2-dimensional array... or does it? Your task is to take an input grid and apply a bubble-sort-like algorithm to it until all values in the grid are non-decreasing from ...
755 views

### Finding Gaps in Date Ranges

Given a list of date ranges r as input, output or return any ranges not found in r. For the sake of this example, input will be ...
756 views

### Arbitrary Interval Ruler

Make a program that takes a length and list of intervals and outputs a ruler of that length with longer ticks for each interval using the line drawing characters ...
10k views

### Sing Baby Shark

"Baby Shark" is a children's song about a family of sharks. Having long been popular as a campfire song, it has been popularized since the mid-2000s by social media, online video and radio. - ...
585 views

### How fast can I say your program?

I recently decided to download some dictation software, in order to help with my writing. However, it doesn't work very well when I'm coding, since I have to change from saying words to symbols and ...
78 views

### Coding Challenge - Create a function that takes in Tuple representation of an ***Object*** [closed]

Tuple A tuple is a data structure that contains a sequence of elements of different data types. It can be used where you want to have a data structure to hold an object with properties, but you don’t ...
240 views

### Return Spiral Indexes!

Spirals are cool , so are numbers, and number spirals are even cooler. But what if I want a specific number, in a specific place using xy coordinates... Challenge Using an infinite spiral moving ...
339 views

### Cell phone Charge

Challenge Taken with permission from my University Code Challenge Contest The dependence we have on mobile phones makes us charge them every night up to the maximum level of the battery, so we do not ...
295 views

### The Great Pyramid of Quine

The task is a rather simple quine challenge with a twist, you must output your source code in the shape of a pyramid. The shape of a pyramid is defined below: ...
2k views

### The Highest Dice

Challenge: Here we have the first 100 items of a sequence: ...
464 views

### How lit is this room? 🔥 pt. 1

Related to this question. A room is defined to be a (not necessarily convex) non-intersecting polygon, expressed as an ordered list of 2-dimensional coordinates. A sufficiently bright lightbulb is ...
75 views

### java program help needed [closed]

Write a java program to play the following game. Randomly select six of the cards Ace, Two, Three,..., Jack, Queen, and King of clubs. Place the six cards into a bag. One at a time, each player ...
968 views

### Meta-bowling Golf

Your task is to create the shortest program (A) that outputs another program (B) with the most unique bytes, which in turn outputs the original program (A). Essentially, you are golfing one half of a ...
416 views

Not to be confused with Password Bishop Goodness! Given a string, answer (truthy/falsy or two consistent values) if it constitutes a password which is strong against bishops. A password is strong ...
379 views

### Drawing a tree from an array

Given a possibly nested, non-empty array of single-digit positive integers (not guaranteed unique), output the ASCII-art representation as a tree, using the box-drawing characters ...
4k views

### The 465 Arrangement

Here's the challenge. Write some code to output all the integers in a range. Sounds easy, but here's the tricky part. It will start with the lowest number, then the highest. Then the lowest number ...
2k views

Derived from this, now deleted, post. Given a string, answer (truthy/falsy or two consistent values) if it constitutes a good Bishop password, which is when all the following conditions are met: it ...
177 views

### Print “beep boop bop” using complicated methods [duplicate]

This challenge is pretty simple: you need to alert / print / show to the user the text "beep boop bop" (or "beep\nboop\nbop", with newlines), but it needs to be obfuscated. (where you couldn't see ...
2k views

### Write the longest period iterating quine bounded by 500 bytes

Your job is to create the longest period iterating quine, where the length of each program in the sequence is bounded by 500 bytes. That is, if you repeat the following steps: Start with your ...
4k views

### The real treasure was the numbers we made along the way

Your task is to write a program, function or snippet (yes, snippets are allowed) that simply outputs an integer. However, you must be able to separate your submission into prefixes that also produce ...
3k views

### N-movers: How much of the infinite board can I reach?

Single moves The board is an infinite 2 dimensional square grid, like a limitless chess board. A piece with value N (an N-mover) can move to any square that is a distance of exactly the square root ...
101 views

### Recursive search golf (JS only) [closed]

Sorry folks, but what I've got for you today is a golf but just limited by JS (or, to be strict, for a day of posting - an ES6 - the most modern set of it - if its ES7 - feel free to EDIT! use MOST ...
312 views

### Help Notwen simulate gravity!

Notwen wants to study the kinematics of bodies thrown from big heights in a uniform gravitational field but unfortunately he doesn't have the technical possibility to go to sufficiently high places ...
575 views

### Tetris! Final heights (Day 3)

Challenge Taken from my university code challenge contest This is actually Day 0 but yesterdays' challenge was too easy and can be a dupe of another question here. Tetris is a video game that became ...
73 views

### determine if the circle is boxed in [closed]

Pretty simple challenge here. Who can make the fastest algorithm (lowest time complexity) to determine whether or not the circle is "boxed in" given the following setup? Input: Your program receives ...
132 views

A radiation-hardened quine can take a hit and stay standing, but nobody ever said that the quine can't be a wuss about it. For this challenge, you should write a quine that: If no characters are ...
1k views

### Indexing the Extended Fibonacci Numbers

You've probably heard of Fibonacci numbers. Ya know, that integer sequence that starts with 1, 1, and then each new number is the sum of the last two? ...
1k views

### Parallel accounts (Day 2)

Challenge Taken with permission from my University Code Challenge Contest After finishing her studies a couple of months ago, Marie opened a bank account to start receiving the payment of her first ...
83 views

### Heart-shaped quine [closed]

As you may or may not know, Valentine's day is getting close. So today, my task for you is: Write a heart-shaped quine Rules: Code should look like an identifyable heart shape, i.e. Has two round ...
2k views

### Superpermutations

Introduction You're a criminal tasked with stealing some secret plans from the new tech startup Dejavu. You sneak in over the back wall, but find a door that requires a pin to open it. You recognize ...
925 views

### Playing Pickomino

In the game Pickomino, there are several tiles lying in the middle of the table, each with a different positive integer on them. Each turn, the players roll dices in a certain way and get a score, ...
3k views

### School moving out (Day 1)

Challenge Taken with permission from my University Code Challenge Contest For some years now, the number of students in my school has been growing steadily. First the number of students was increased ...
2k views

### Borderless table

In this challenge you are going to place letters from the alphabet in a Cartesian plane and output the result as a text. Your input will consist in a list of list with 3 parameters: X coordinate Y ...
1k views

### Quine outputs itself in binary

Your task, if you wish to accept it, is to write a program that outputs its own source code in the binary UTF-8 representation. Rules The source must be at least 1 byte long. Your program must not ...
4k views

### Covering a Skyline with brush strokes

Given a non-negative integer skyline height list, answer how many uninterrupted 1-unit-high horizontal brush strokes are needed to cover it. [1,3,2,1,2,1,5,3,3,4,2]...
1k views

### A Turtle Finds a Portal

The turtle wants to move along the grid to get to his food. He wants to know how many moves it will take for him to get there. As well since he is slow he has teleporters set up around his domain ...
2k views
+200

An activity I sometimes do when I'm bored is to write a couple of characters in matching pairs. I then draw lines (over the tops never below) to connect these characters. For example I might write \\$...
277 views

### Generate the k-ary necklaces of length n

The set of necklaces is the set of strings, where two strings are considered to be the same necklace if you can rotate one into the other. Your program will take nonnegative integers ...
156 views

### Minimum-cost flow problem

A flow network is a directed graph G = (V, E) with a source vertex s ϵ V and a sink vertex ...
279 views

### Countries by Area

Challenge Given two non negative integers a < b, output all countries, from the below Top 100 Countries, where area is between ...
533 views

### Plight of the Concorde

Background The traveling salesman problem (TSP) asks for the shortest circuit that visits a given collection of cities. For the purposes of this question, the cities will be points in the plane and ...
3k views

### Find the needle in the haystack

Given a rectangular haystack of size at least 2x2 composed of all the same printable ASCII characters, output the location (counting from the top-left) of the needle which is a different character. ...