Alexander Udalov
41a416da60
Delete all test methods (and empty test classes), since they'll be auto-generated
26 lines
780 B
Kotlin
26 lines
780 B
Kotlin
import java.util.ArrayList
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fun Int.plus(a: Int?) = this + a!!
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public open class PerfectNumberFinder() {
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open public fun isPerfect(number : Int) : Boolean {
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var factors : MutableList<Int?> = ArrayList<Int?>()
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factors?.add(1)
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factors?.add(number)
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for (i in 2..(Math.sqrt((number).toDouble()) - 1).toInt())
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if (((number % i) == 0)) {
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factors?.add(i)
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if (((number / i) != i))
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factors?.add((number / i))
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}
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var sum : Int = 0
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for (i : Int? in factors)
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sum += i
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return ((sum - number) == number)
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}
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}
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fun box () = if (PerfectNumberFinder().isPerfect(28)) "OK" else "fail"
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