Lua translation Can someone review it ? Thanks

try putting the rooks on a (possibly virtual) chessboard for a small n (2, 3 or 4) and see how you would count the positions if you were to do it manually. you should be able to notice how the position of one rook determines that of the rook on the next rank or file

For the life of me I could not figure out a solution yet alone an elegant one, is anyone able to give me hints/tips? I don't think this is a 7kyu kata, I might be wrong though.

upgraded to chai.assert.strictEqual

fixed by using BigInt for the output

Thanks!

fork fixing JavaScript

JS fork with random tests and using BigInt for the output (fixing this and this issues)

(author gone)

Going to the comments section was the best decision I made in a long time ;)

Approved

python new test framework is required. updated in this fork

( JS )

• No random tests
• Uses Test.expect
• Overflows Number.MAX_SAFE_INTEGER

( Haskell )

• Doesn't check type signature - any (Num a,Enum a) => a -> a will do, which allows floating point types and types that will lead to overflow

Floating point representation inaccuracy.

For numbers that are going to lose precision, product [1..n] is not the same as product [n..1].

Approved.