OJ Board

But in the first polygon, point 1, point 2 and the center don't form a triangle with 90 degrees(you can see that in the picture.)

I think they form a 90 degree, got AC is because the judge haven't such test cases.

I change my code with reject and accept 90 degrees both get AC

Hello Adm!
When I register my previous account, I select "below 13 years old" by accident ( I am over 20 years old), with the email which I dailly check.
Now, I can't login with that account.
Could you help me enable my account "xltang xiliu.tang@gmail.com".
Thanks,
--Xiliu