Lots of Parabolas
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n개의 포물선 모두의 내부에 있는 점을 하나 찾는다. a>0이면 위쪽, a<0이면 아래쪽이 내부이다.
문제
On a plane there is a set of parabolas given by equations in the form .
Let's consider a point to be located inside a parabola if it located above the parabola in case of positive coefficient , or below the parabola in case of negative .

On this figure, the point is located inside both parabolas, the point is inside one of them, and the point is inside none of them.
You need to find any point that is located inside all parabolas. It is guaranteed that such point exists.
입력
The first line contains a single integer () --- the number of parabolas.
Each of the next lines contains three integers , , (; ), describing a parabola .
출력
Print two real numbers and --- coordinates of a point located inside all parabolas.
The answer is considered correct if there exists a point at distance at most from the printed one, which is located strictly inside all parabolas.