What does it mean: "reach smth"?
It's a strict condition, but how should i understand it?)
In my opinion, this sample has two right answers:
4
0 0
0 1
0 5
0 8
2 * (1.5 * 1.5) * M_PI or (1 + 3 * 3) * M_PI.

Firstly i calculate the longest rope lenths at each tree.
Then just try to tether goats to every tree, calculating the square.
If sum of 2 maxrope are larger then lenght between trees:
double maxrad = std::max(maxr[i], maxr[j]);
double minrad = l - maxrad;
if (minrad < 1.0)
{
    maxrad = maxrad - (1 - minrad);
    minrad = 1.0;
}
if (maxrad >= 1.0)
maxsize = std::max(maxsize, square(maxrad)+sqree(minrad));

I've got wrong answer on 20th test. Please could anybody give me some test, which will help?

I got right answers on all test in the forum... help me

View submissions
2451935 - WA-1
2451940 - AC

The only differ is language. C or C++.
Explain, please, this effect.

"You may assume that the goat is fastened so that it can’t leave the plot’s area."

Can you explain clearly? Does it matter to solve the task?

P. S. WA#5