Hello, my friends !
I composed a very interesting test
1000 10
2
5 5 5 5
my program found 135.00, obviously correct.

Then, I tested this
1000 10
3
5 5 5 5

and I got 116.57. This is correct, too.

For the following test
10 10
4
5 5 5 5
my answer is 45.00
Is there any different kind of data set for I get WA 14 ?