import scala.io.StdIn.readLine

object Main{
  def main(args: Array[String]){
    val n = readLine().toLong
    val a = readLine().split(" ").map(_.toLong)
    val used = scala.collection.mutable.Set[Int]()
    val MAXK = 62
    for(k <- MAXK to 0 by -1){
      val mask = 1L << k
      val usable = (v : (Long,Int)) => v match {
        case (e,i) => !used(i) && (e & mask) != 0
      }
      a.par.zipWithIndex.find(usable) match {
        case Some((e,i)) => {
          used += i
          a.par.zipWithIndex.filter(usable)
            .foreach({case (_,h) => a(h) = a(h) ^ e});
        }
        case None => Unit
      }
    }
    println(1L << a.count(_ != 0))
  }
}