class Resolution: Hashable {

    var horizontal: Int
    var vertical: Int

    var hashValue: Int {
        return horizontal.hashValue ^ vertical.hashValue &* 16777619

    }

    init(horizontal: Int, vertical: Int) {
        self.horizontal = horizontal
        self.vertical = vertical
    }

    static func == (lhs: Resolution, rhs: Resolution) -> Bool {
       return lhs.vertical  ==  rhs.vertical && lhs.horizontal  == rhs.vertical
    }

}