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import Darwin

extension Int {
    static func random() -> Int {
        return Int(arc4random())
    }

    static func random(range: Range<Int>) -> Int {
        return Int(arc4random_uniform(UInt32(range.endIndex - range.startIndex))) + range.startIndex
    }
}

extension Double {
    static func random() -> Double {
        return drand48()
    }
}