std::pool

import java.io.File
import java.util.concurrent.Executors

private fun Number.fib(): Number {
    if (toLong() < 3)
        return 1

    var f = 1
    var s = 1
    val numberLong = toLong()

    (3..numberLong).forEach { _ ->
        val mem = s
        s += f
        f = mem
    }

    return s
}

fun main() {
    print("Number of threads: ")
    val executor = Executors.newFixedThreadPool(readLine()!!.toInt())

    File("file.txt").forEachLine {
        executor.execute {
            println(it.toInt().fib())
        }
    }

    executor.shutdown()
}