Inlägg "I have a question regarding Aspen Avenue: The ..." | Problemlösning och programmering under press (DD2458)

I have a question regarding Aspen Avenue:

The problem says errors should be within 10^-6 absolute and relative error, but i suspect the judge actually does a string match or has calculated it's test values with sub-optimal precision. Thus one must calculate the answer in the same way as the judge, rather than actually being within error bounds. Are Aspen Avenue's test cases really correct?

A similar problem occurred in ljutnja where the answer must be cast to a 64 bit unsigned integer so that it overflows to an erroneous answer, thus matching the test data and giving a "correct" answer on Kattis.

I'm having the same problem with aspen. Kattis won't accept my answer even after rounding exactly like in the examples. Any help would be appreciated!

I have double-checked and Kattis does use the stated absolute/relative tolerance. So printing the answer with 6 digits and rounding either way will be sufficient (and adding a few more digits to the output doesn't hurt).

In other words the output formatting is not the likely culprit, but there is probably some other bug, either in the algorithm, or in its implementation. I can try to give more concrete hints if I get a Kattis submission ID.

(PS regarding ljutnja I just answered on that post, but do note that what you write here about the answer having to be truncated to a 64-bit integer is not correct.)

Thank you for the answer!

Could you take a look at ID 766056 then? All the test cases i try just give me correct answers to the last decimal.

Also: I commented the ljutnja post and double checked. There is something strange going on having to do with 64 bit integers, as i can get the correct answers simply by taking mod 2^64 to my existing python algorithm, which otherwise gives "wrong answer" on Kattis.