class Covid {

  var population: Int
  var cases: Int

init(population :Int, cases: Int) {
  self.population = population
  self.cases = cases
}

func infection(){
  cases -= 1
}

func Recover(){
  cases += 1
}
func wasDeath() {
   population -= 1
  if population <= 0{
    print("The population are reducing")
  }

  }
}

class Doctor: Covid{
  let doctor: String
  var remainingPatient: Int

  init(doctor: String, remainingPatient: Int, population: Int, cases: Int ){
    self.doctor = doctor
    self.remainingPatient = remainingPatient
    super.init(population :population, cases: cases)

  }

  func manpower(){
    if remainingPatient > 0 {
      remainingPatient -= 1
    } else{
      print("You have no enough of doctor")
    }
  }
}

class Hospital: Doctor {
  var slots: Int

  init(slots: Int, doctor: String, remainingPatient: Int, population: Int, cases: Int)
  {
    self.slots = slots
    super.init(doctor: doctor,remainingPatient: remainingPatient, population: population, cases: cases)
  }

override func wasDeath(){
  if slots > 0{
    slots -= 1
  } else {
    super.wasDeath()
  }
}
}

let Hospitals = Covid(population:12345,cases:1256)

let recover = Doctor(doctor:"First Line",remainingPatient:100,population:234,cases:98)

let Hospitalss = Hospital(slots:100, doctor:"RegencyHospital", remainingPatient:10, population:120, cases:10)

let Malaysia = Covid(population:100,cases:100)

let people = Malaysia
print(Malaysia.population)
print(people.population)
people.infection()
print(people.population)
print(people.population)