Hello! thank you bro i have understood the Solution of the kata. may you give me a source where i find this case.
thank you again.

Crikey, that number won't even fit in 128 bits. :O

BigInt implemented, coud you retry?

How big can the values get in the 100'th triangle? Maybe BigInt is required here as you point out.

The second solution and old reference solution had floating point issues. I have added an integer only solution now. But I still get different results than your first solution.

Are you even sure this first solution of yours is correct?

Edit: my fix doesn't work. I'll need to come up with a different solution that does not involve floating point operations.

thanks for the report, it should be invalidated soon

I've even copied previous working solutions that don't use .join() and I am still getting the same error saying I'm using join. I wonder if it's something to do with the tests?