text: #!/usr/bin/env python
  def fibonacci(n):
    if n == 0:
      return 0
    elif n == 1:
      return 1
    else:
      return fibonacci(n-1) + fibonacci(n-2)
  
  if __name__ == "__main__":
    import sys
    x = int(sys.argv[1]) # Hay maneras mas elegantes
    print(fibonacci(x))
  