def leftRotate(w: Long, k: Int): Long =
    val wBinary = (0 to 63).toArray.map(j => (w >> 63 - j) & 1).flatMap(b => "%d".format(b))
    println(new String(wBinary))
    var j = 0
    val rArray = Array.fill(64)('1')
    while j <= 63 do
      rArray((j + k)%64) = wBinary(j)
      j += 1

    val rString = new String(rArray)
    println(rString)
    java.lang.Long.parseLong(rString.reverse, 2)