The test suite has been enhanced.
The creator of this problem might have indeed banged his head, which has affected his ability to think properly. I wish such stupid and meaningless problems stop showing up on Cody.
I admit that the time I'll spend on correcting the text of sufferers of Bangolangosis is small, but what I learned about regexprep from solving this problem will surely help me in other applications.
Given a 4x4 matrix, swap the two middle columns
subtract central cross
Convert given decimal number to binary number.
Volume of this donut
swap sign sum & multiply castles
Have you seen any Spindromes recently?
speed vs size
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