Linked Questions

585
votes
281answers
215k views

Produce the number 2014 without any numbers in your source code

Note to challenge writers as per meta consensus: This question was well-received when it was posted, but challenges like this, asking answerers to Do X without using Y are likely to be poorly ...
143
votes
244answers
27k views

Unscramble the Source Code

Note: This challenge is now closed to new cop submissions. This is to ensure that no one can post submissions that only remain uncracked because there aren't enough robbers interested in the challenge ...
90
votes
109answers
24k views

4, 8, 15, 16, 23, 42 [closed]

4, 8, 15, 16, 23, 42 Write a program that outputs this sequence of numbers infinitely. However, The Numbers must not appear in your source code anywhere. The following is not a valid Java program to ...
44
votes
182answers
18k views

Unscramble the Source Code [robber thread for cracking attempts]

This is the companion thread to the main Unscramble the Source Code challenge. If you think you have managed to unscramble one of the cop answers, you should post your solution as the answer to this ...
77
votes
69answers
15k views

Largest number in ten bytes of code

Your goal is to print (to the standard output) the largest number possible, using just ten characters of code. You may use any features of your language, except built-in exponentiation functions. ...
135
votes
28answers
11k views

Making Future Posts Runnable Online with Stack Snippets

Stack Snippets were recently added to PPCG! Reminiscent of JSFiddle, Stack Snippets allow HTML, CSS, and JavaScript to be run directly in posts! Here is a very simple Stack Snippet: ...
100
votes
20answers
8k views

Sort a list and write some English!

Your boss managed to read the secret hidden message. He didn't end up firing you, though, he just made you a secretary and forbade you from writing code. But you're a programmer. You need to write ...
55
votes
24answers
6k views

Significant Whitespace

We define whitespace to be any of the three characters, tab (0x09), newline (0x0A) or space (0x20). For this challenge, you're to write two programs or functions in the same programming language, ...
54
votes
7answers
7k views

Duct tape can fix Mother's Day

Based on the Duct tape can fix anything question, that was too broad, with very similar rules. Only this time the objective is very specific: The challenge Your mission is to make a program that ...
11
votes
12answers
54k views

Smallest python script to print even numbers 0 to 100

I'm work on a problem which I set myself for fun, which is to create a python script which prints the even numbers from 0 to 100. The challenge is to make the script as small as possible. This is what ...
19
votes
29answers
6k views

Multiply all numbers in a string

Winner: Chilemagic, a massive 21 bytes! You may continue to submit your answer, however you can no longer win. Original post kept: Your goal is to find all numbers in a string, and multiply each one ...
77
votes
5answers
6k views

Recognise Stack Exchange Sites by Their Icon

After spending a while on Stack Exchange, I can recognise most sites in the Hot Network Questions by their little icon (which is also their favicon), but certainly not all of them. Let's write a ...
29
votes
19answers
4k views

Shortest Unique Substrings

Input An alphanumeric string s. Output The shortest string that occurs exactly once as a (contiguous) substring in s. ...
32
votes
9answers
4k views

Kolmogorov-mania

The Kolmogorov complexity of a string s is defined as the length of the shortest program P that outputs s. If the length of P is shorter than the length of s, then s is said to be compressible, ...
10
votes
23answers
10k views

Rotate An Integer Array with an O(n) algorithm [closed]

Write a function that rotates an integer array by a given number k. k elements from the end should move to the beginning of array, and all other elements should move to right to make the space. The ...

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