from __future__ import absolute_import
from __future__ import division
from __future__ import print_function


class MaxPriorityQueue(object):
	"""Max Priority Queue."""
	def __init__(self):
		pass


def main():
	pass


if __name__ == '__main__':
	main()

from __future__ import absolute_import
from __future__ import division
from __future__ import print_function


def parent(i):
    return i // 2

def left(i):
    return 2 * i

def right(i):
    return 2 * i + 1


class MaxPriorityQueue(object):
	"""Max Priority Queue."""
	def __init__(self):
		pass


def main():
	pass


if __name__ == '__main__':
	main()

Add parent(), left() & right()