old_contents: #!/usr/bin/python3
  
  from checker.local import LocalChecker as BaseChecker
  #from checker.contest import ContestChecker as BaseChecker
  
  OK = 0
  TIMEOUT = 1
  NOTWORKING = 2
  NOTFOUND = 3
  
new_contents: #!/usr/bin/python3
  
  from checker.local import LocalChecker as BaseChecker
  #from checker.contest import ContestChecker as BaseChecker
  
  OK = 0
  TIMEOUT = 1
  NOTWORKING = 2
  NOTFOUND = 3
  
  _mapping = ["OK", "TIMEOUT", "NOTWORKING", "NOTFOUND"]
  
  def string_to_result(strresult):
      return _mapping.index(strresult)
  
  def result_to_string(result):
      return _mapping[result]
  
subject: Add forward/reverse mapping of checkerstati