import sys

def main():
	"""Main entry point."""
	ladder = get_full_ladder()
	pass

def get_full_ladder():
	"""Retrieve the full ladder spots"""
	pass

def initiate_challenge(p1, p2):
	"""Start a challenge between two players."""
	pass

def complete_challenge(winner, loser):
	"""Complete the challenge."""
	pass

def update_ladder(winner, loser):
	"""Look at the winner and loser, and determine if they need to swap spots or not."""
	pass

if __name__ == '__main__':
	sys.exit(main())
