HDU -- 4379 -- the more the better

If we want to obtain a sub-sequence that satisfies yi + YJ <= L (L is converted to double type), then if Yi <= l/2, it must be added, if Yi> L/2.

Method:

Consider O (N)Algorithm, Directly brute force, and then obtain the answer.

... Tle ....

It seems that the force is not good ~ Consider nonviolence ~~~

First, calculate the cyclic section cyclically, and record whether there is a value beyond l/2. Then, calculate the part that exceeds the cyclic section by skipping the cyclic section.

This is also tle...

The Mark process was actually violent, but there was no TLE. It was amazing because I used the max, Min function, and the system was slow...