My prog got ac, but haven't passed this test:
4
1 1 1
1 1 1
1 1 1
1 1 2
correct answer - 4, answer of my prog - 2.

It is obvious two objects can not be located at one point (otherwise we'd mention it in the statement).

But if you have some new correct tests, you may send them to dimanyes@gmail.com, and we will add them into the test set.

(usually authors care to mention only the opposite :)