문제
누구나 다 아는 꿍텔레콤은 새로 건설된 고속도로에 꿍전파를 널리 퍼뜨리기 위해 여러 기지국들을 세우려고 했다. 하지만 언제나 어설픈 꿍은 발전소가 없다는 것을 뒤늦게 알아차렸다. 기지국마다 발전소를 만들수는 없으므로 단 하나의 발전소만을 만들어 기지국들에 전력을 공급해야 한다. 이때 발전소는 고속도로상에 지을 예정이며 고속도로상의 임의의 지점에서 가장 가까운 발전소까지의 거리를 d라고 했을 때 d의 값이 최대가 되는 곳에 지으려고 한다.
하지만 꿍은 언제나 어설프다. 이번에도 여러분의 도움이 필요하다.
출력
d값들 중 최대가 되는 값 단 하나를 출력하면 된다.
단, 소수점 아래 3자리까지의 정확도를 가져야한다.
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
