class Zombie {

private:
  String name
  double distance
  int speed
  boolean dead

public:
  //accessors methods
  String getName()
  double getDistance()
  int getSpeed()
  boolean isDead()

  Zombie(String, int, int, int)
  void move() -- Reduces this zombie's distance by its speed, to a min of 0 distance.
  void die()  -- Kills this zombie.

}


class UsernameA17 {

  public static void main(String[] args)
    
    processes the command line arguments (if correct) to get:
      int killzone
      String inputFilename
      String outputFilename (if 3 args given)
    otherwise, will print appropriate error message and return.
    Then:
    zombieList = loadFile(inputFilename)
    output = runSimulation(zombieList, killzone)
    print output
    if there is an outputFilename:
      appendToFile(outputFilename, output)

  
  public static ArrayList<Zombie> loadFile(String inputFile)
        throws FileNotFoundException, InputMismatchException, NoSuchElementException
     
     Opens the given inputFile, reads it in, and creates one zombie per line 
       of the file.  Returns the resulting list of zombies.
     Throws different exceptions if the file cannot be found, if the file contains 
     data in the wrong format, or if the file is missing data on a line.


  public static appendToFile(String outputfile, String contents)
     
     Opens the given outputFile and appends the given contents 
     to the end of the file.


  public static String runSimulation(ArrayList<Zombie> list, int killzone)
    
    Given a list of zombies and a killzone radius, 
    returns output (as a String) of the simulation result.

    More specifically:
      count starts at 0
      each round:
        increment count (so to 1 first time through)
        nearest = getNearestZombie(list)
        if nearest in killzone range:  //human takes a shot if possible
          nearest.die()
          (append to output any details of a zombie kill)
        for each zombie in list:  //all zombies move in towards human
          zombie.move()
        if hasZombieReachedHuman(list) != null:
          return finished output: FAIL
        if !isDanger(list):
          return finished output: SURVIVED

  
  public static Zombie getNearestZombie(ArrayList<Zombie> list)
    
    Returns the zombie (that's not dead) with the smallest distance

 
  public static Zombie hasZombieReachedHuman(ArrayList<Zombie> list)
    
    If one (or more) of the zombies in the list has a distance of 0, returns
    the first one found.  If no zombies has reached the human yet, 
    returns null instead.

    
  public static boolean isDanger(ArrayList<Zombie> list)

    Returns whether there is still an undead zombie in the list with 
    a positive speed.

}