You are using operations which lose precision because numbers will be converted to floating point which is not sufficient for numbers with more than 53 bits.

But there was a similar bug also in the Ruby reference solution which I have fixed now.

Thank you, my solution passes now.

I merged a fix, can you please verify.

PHP: Reference solution seems to be wrong for big random integers:

testRandomIntegers
Random digit tested: 4268314017451212801
Failed asserting that 0 is identical to 2.

Reference solutions of other languages show that 0 is correct.

both users no longer active

duplicate suggestion

Something broke in random Ruby tests. Some tests say that I have wrong answers, but when I check them through puts, it gives the correct values, those - my solution returns the correct answers, but the tests perceive them with different values

For example

def champernowe_digit(n)

...

p res #=> 6

res

end

#=> Random digit tested: 8563414405108046 - Expected: 6, instead got: 5

Marking this as resolved since I didn't receive a reply.

Thanks for letting me know. The test cases have been updated to work with Python 3.6 and Ruby 3.0

• Python new test framework should be used (Refer this & this for more detail)

• Ruby 3.0 should be enabled (Refer this & this for more detail)

Fixed.

Fixed.

Could you give an example?

Fixed.