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package Main | |
import java.io.{FileOutputStream, FileInputStream} | |
import scala.io.StdIn | |
object Main extends App { | |
Console.setIn(new FileInputStream("example.in")) | |
Console.setIn(new FileInputStream("B-large-practice.in")) | |
Console.setOut(new FileOutputStream("B-large-practice.out")) | |
def solve(li:Int, ri:Int, ai:Array[Int]):Double = { | |
Math.exp(ai.slice(li, ri + 1).map(Math.log(_)).sum / (ri - li + 1)) | |
} | |
val cases = StdIn.readLine().toInt | |
(1 to cases) foreach { n => | |
val Array(_, m) = StdIn.readLine().split(" ").map(_.toInt) | |
val ai = StdIn.readLine().split(" ").map(_.toInt) | |
println(s"Case #$n:") | |
(1 to m) foreach ( v => { | |
val Array(li, ri) = StdIn.readLine().split(" ").map(_.toInt) | |
println(solve(li, ri, ai)) | |
}) | |
} | |
} |
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