:) Well done!
So glad to see this, though it has been 4 years since then and I am no longer able to spare time to finish the authoring of this kata. But anyway this problem and the solutions to it has their own aesthetic value.

It should be fixed now.

Could you provide some instructions? I am not familiar with the usual way to do random tests on CodeWars.

It sould be fixed now.

Nice kata, a good exercise for me.

Fixed, one of them should be {(1,0),(1,1),(0,2)}. Thank you for the issue.
And for kkY, triangle should be a set of 3 points but not a sequence of 3 points. That is to say, {A, B, C} and {A, C, B} denote a same triangle.

I don't think 780 should be excluded from the test cases, since my solution can generate answers for all N up to 2000 in 2 sec.
(btw, my solution is based on a strange search strategy proposed by one of my classmates...

.....I realized that I was so stupid and wrote tons of code after just having a look of one of others' solution
You guys can view my solution and will know why I am saying I was so stupid....

After reading others' solution, I realized that I was so stupid.................

Great, thanks for your reply

Thanks for your reply.
Actually I have struggled on this kata for a whole day.
And is there any other workable solution?
I just need some confidence.

I'm always failed to attach.
It always compains 'Unable to get pid of LinuxThreads manager thread'.
And I'm sure the current pid is always 1.
Can you make sure if this way is still feasible.