Roman Popov ripopov

## gist:24fbfa9f22ce2c27e26f0bf9861e193a
# Your code here
# You can import some modules or create additional functions

class Node:
    def __init__(self, location, step_dir, prev_node):
        self.loc = location
        self.step = step_dir
        self.prev = prev_node

class Solution:
	# Your code here
	# You can import some modules or create additional functions

	class Node:
	def __init__(self, location, step_dir, prev_node):
	self.loc = location
	self.step = step_dir
	self.prev = prev_node

	class Solution: