DrawArc - onlyneed count

func countDraw(_ arr:[Int]) -> Int{
  guard arr.count > 0 else {return 0}
  var temp = arr

  while temp[0] != 0 {
    //need to check count!!!, for all 1 case
    // todo
    let f = temp.removeFirst()
    temp.append(f)
  }
  var res = 0
  var i = 0
  while i < temp.count{
    if temp[i] == 0 {
      i += 1
      continue
    }
    res += 1
    i += 1
    while i < temp.count && temp[i] != 0 {
      i += 1
    }
  }
  return res
}