wrote a bunch of shit for it in python til i realiyed its java i am mad now

Duplicate. Closing.

look at my code, i didn't calculate the factorial and solution is a mathematical sum who is very quick... it should not refused due to server time error... also, what does server time error has in relation with an objective test ? I missunderstand the idea, because if the server has a full load, what does it happend ? you trash users who provide an efficient solution ?

Don't mutate the input.

Not an issue. Your solution is wrong.

That code seems O_n² so it's not so rare it won't work. To increase the readability of comments or descriptions, see this page in the github wiki.

It worked for me (translated your js code to Python), and without actually seeing what you tried, it's hard to say, next time use Question label (and paste your code with proper markdown and marking your post as ahving spoiler content), not issue, see how many people passed the kata in Python.

Hint: You're not meant to calculate the factorial. Find another way to find the number of zeros.

Read the hint, try another way.

Then you should not fill the buffer to so much extent?