Linked Questions
19 questions linked to/from PPCG Jeopardy: Robbers
143
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Shortest infinite loop producing no output
Your task is to create the shortest infinite loop!
The point of this challenge is to create an infinite loop producing no output, unlike its possible duplicate. The reason to this is because the code ...
- 13k
172
votes
483
answers
34k
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Implement a Truth-Machine
A truth-machine (credits goes to this guy for coming up with it) is a very simple program designed to demonstrate the I/O and control flow of a language. Here's what a truth-machine does:
Gets a ...
- 11.2k
192
votes
175
answers
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What is the smallest positive base 10 integer that can be printed by a program shorter (in characters) than itself?
I think the question as above is clear, but just in case:
Write a full program (not just a function) which prints a positive base 10 integer, optionally followed by a single newline.
Qualifying ...
- 1,939
239
votes
115
answers
43k
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Print every character your program doesn't have
Your task is to build a program (using only printable ASCII characters and/or tabs and newlines) that prints out exactly the characters in the printable ASCII space (...
- 34.6k
32
votes
101
answers
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Print the ASCII table
The task is to display n characters of the ASCII table.
You may write a function (or a program that takes the argument as a parameter, STDIN is allowed as well) that takes a parameter n, which will ...
- 582
49
votes
35
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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 ...
- 14.4k
25
votes
29
answers
3k
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Different Way Forward
Given a list of integers produce a Forward Difference at a specified order/depth.
For the list of integers:
(10, 18, -12, 4, 8, -3, -5, 67, 9, 14)
The Forward ...
- 12.2k
29
votes
26
answers
1k
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Natural construction
The natural numbers including 0 are formally defined as sets, in the following way:
Number 0 is defined as the empty set, {}
For n ≥ 0, number n+1 is defined as n ∪ {n}.
As a consequence, n = {0, 1, ...
- 104k
27
votes
29
answers
1k
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Substring Sum Set
Introduction
Let's observe this array: [3, 2, 4, 1, 1, 5, 1, 2].
Each element displays the length of the substring which must be summed up. Let's take a look at ...
- 44.2k
42
votes
16
answers
7k
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Use xkcd's formula to approximate the world population
In xkcd 1047, Randall Munroe lists "slightly wrong" approximations of assorted quantities and numbers with varying precision and complexity, such as that the number of liters in a gallon is very close ...
- 10.3k
41
votes
9
answers
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"Convenient palindrome" checker
If you've ever tried to write palindromic code before, you'd know how much brackets tend to get in your way. ()() is not a palindrome, even though it kinda looks ...
- 8,676
23
votes
15
answers
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Keep the unique characters down
It's very simple: Your program or function should generate the following text:
...
- 4,790
19
votes
19
answers
3k
views
Calculate hamming weight with low hamming weight
Create a program that computes the hamming weight of a string. Winner is the program with the lowest hamming weight.
Rules:
Hamming weight for an ASCII character is defined as the total number of ...
- 4,506
16
votes
14
answers
1k
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Evaluating the score based from a chess FEN string
Challenge
Forsyth–Edwards Notation (FEN) is a standard notation for describing a particular board position of a chess game. Your challenge is to evaluate the score using the FEN string. This is an ...
- 44.2k
10
votes
20
answers
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Calculate probability of getting half as many heads as coin tosses.
Write a program that, given a small positive even integer from standard input, calculates the probability that flipping that many coins will result in half as many heads.
For example, given 2 coins ...
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