Hello Codeforces,

My country has never previously taken part in IZhO, but we want to participate this year. We've got some questions as it's our first participation. We sent a mail to IZhO but we haven't gotten a reply yet. So, I will ask here. Hopefully, any other contestant or organiser can answer:

-Will IZhO23 be onsite or online?

-Does the registration fee include accommodation if the event is on-site?

-When's IZhO23?

-We're less than 7 people and will participate in the computer science competition only, Is the registration fee 50$ per person?

In addition, we want to know other countries that will participate in IZhO23 in case of an onsite event. If your country is going to participate in IZhO23, please comment.

Hello there. I have experienced an unexpected problem when calculating square root of a function. I used sqrtl(number+EPS) and I expected it to pass system testing in today's problem B. My equation was a quadratic equation and it should've passed. 74435525 this is my submission. I've found that the sqrtl() only calculated to 4 decimal places precision. I expected it to be more precised. I am not sure why the precision was very inaccurate?(In the hack, I got wrong answer due to precision error). I googled my problem before asking here. I also used __float128 in custom invocation tab with 64 bit C++ with my custom square root function using binary search and still, it wasn't accurate. The testcase that made me fail:

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36000 600000000