text: #!/usr/bin/python3
  # Copyright (c) 2018 Bart Massey
  # [This program is licensed under the "MIT License"]
  # Please see the file LICENSE in the source
  # distribution of this software for license terms.
  
  
  # Generate a "Robot Tour" problem (Skiena, Algorithm Design
  # Manual [2nd ed], Chapter 1).
  
  from random import random
  from math import sqrt
  from sys import argv
  
  def coord(n):
      """Generate a random coordinate in the range 0..1
      distributed according to sqrt."""
  
      return round(sqrt(random()), 3)
  
  def points(n):
      """Generate a list of n random points with coords in the
      range 0..1"""
  
      result = []
      for _ in range(n):
          result.append((coord(n), coord(n)))
      return result
  
  # Generate an instance.
  if __name__ == "__main__":
      n = int(argv[1])
      ps = points(n)
      for p in ps:
          print(*p)
  