Top new questions this week:
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In chess, the Fool's Mate is the fastest possible way to reach checkmate. It is reached with Black's second move. In chess notation, one possible sequence of moves that achieves Fool's Mate is ...
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Carryless multiplication is an operation similar to binary long multiplication, but with XOR instead of addition:
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I recently stumbled across this image on wikimedia commons. It's a little bit of an information overload at first, but after examining it a bit it shows an interesting number system for writing ...
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A composition of an integer \$n\$ is a representation of \$n\$ as a sum of positive integers. For example the eight compositions of 4 are as follows:
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Write a program/function that finds the amount of fuel needed to escape Earth's gravity well given the exhaust velocity of the fuel and the amount of mass to transport using the Tsiolkovsky rocket ...
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Greatest hits from previous weeks:
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This challenge is a tribute to the winner of Best Picture at the Oscars 2017, La La Land Moonlight!
Write a function/program that takes a string containing only letters ...
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Note: a 1000 point bounty is still available for this challenge, which I will create and award if anyone takes the top score without using built-in compression.
Below is a ...
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Introduction
We all know the cool S (also known as Superman S, Stüssy S, Super S, Skater S, Pointy S, Graffiti S etc. etc.): billions of schoolchildren around the world drew this S and immediately ...
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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 (...
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This year's UEFA Euro 2016 is over and besides a couple of negative headlines there has been a very positive surprise as well – the Iceland national football team. Let's draw their national flag.
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Your favourite programming language has just had a birthday. Be nice and sing it the Happy Birthday song.
Of course you should accomplish this by writing a program in that language.
The program takes ...
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Introduction
You're probably familiar with zip bombs, XML bombs, etc. Put simply, they are (relatively) small files which produce enormous output when interpreted by naïve software. The challenge ...
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