rus: "координаты точек соответственно на правой и левой границах обстрела."

eng: "coordinates of the right and the left bounds of the arc of fire."

It is problem from school championship so Russian text is original. Add please word "correspondingly" (or equivalent) in english text. It is _very_ important for some solutions of this problem.

Also word "points" would be great because there is no such thing as "coordinates of the bounds".