



'''simple docstring'''




import os
import string
import sys


UpperCamelCase__       :	int    = 1 << 8

UpperCamelCase__       :	Tuple    = {
    '''tab''': ord('''\t'''),
    '''newline''': ord('''\r'''),
    '''esc''': 27,
    '''up''': 65 + ARROW_KEY_FLAG,
    '''down''': 66 + ARROW_KEY_FLAG,
    '''right''': 67 + ARROW_KEY_FLAG,
    '''left''': 68 + ARROW_KEY_FLAG,
    '''mod_int''': 91,
    '''undefined''': sys.maxsize,
    '''interrupt''': 3,
    '''insert''': 50,
    '''delete''': 51,
    '''pg_up''': 53,
    '''pg_down''': 54,
}

UpperCamelCase__       :	str    = KEYMAP['''up''']
UpperCamelCase__       :	Any    = KEYMAP['''left''']

if sys.platform == "win32":
						UpperCamelCase__       :	Tuple    = []
						UpperCamelCase__       :	List[str]    = {
						    B'''\xe0H''': KEYMAP['''up'''] - ARROW_KEY_FLAG,
						    B'''\x00H''': KEYMAP['''up'''] - ARROW_KEY_FLAG,
						    B'''\xe0P''': KEYMAP['''down'''] - ARROW_KEY_FLAG,
						    B'''\x00P''': KEYMAP['''down'''] - ARROW_KEY_FLAG,
						    B'''\xe0M''': KEYMAP['''right'''] - ARROW_KEY_FLAG,
						    B'''\x00M''': KEYMAP['''right'''] - ARROW_KEY_FLAG,
						    B'''\xe0K''': KEYMAP['''left'''] - ARROW_KEY_FLAG,
						    B'''\x00K''': KEYMAP['''left'''] - ARROW_KEY_FLAG,
						}

for i in range(10):
						UpperCamelCase__       :	Optional[Any]    = ord(str(i))


def 				lowerCAmelCase_   (	):
		if os.name == "nt":
				import msvcrt

				__SCREAMING_SNAKE_CASE       :		Dict           =		'mbcs'
				# Flush the keyboard buffer
				while msvcrt.kbhit():
						msvcrt.getch()
				if len(_lowerCamelCase					) == 0:
						# Read the keystroke
						__SCREAMING_SNAKE_CASE       :		str           =		msvcrt.getch()

						# If it is a prefix char, get second part
						if ch in (b"\x00", b"\xe0"):
								__SCREAMING_SNAKE_CASE       :		List[Any]           =		ch + msvcrt.getch()
								# Translate actual Win chars to bullet char types
								try:
										__SCREAMING_SNAKE_CASE       :		List[Any]           =		chr(WIN_KEYMAP[cha]					)
										WIN_CH_BUFFER.append(chr(KEYMAP["""mod_int"""]					)					)
										WIN_CH_BUFFER.append(_lowerCamelCase					)
										if ord(_lowerCamelCase					) in (
										    KEYMAP["insert"] - 1 << 9,
										    KEYMAP["delete"] - 1 << 9,
										    KEYMAP["pg_up"] - 1 << 9,
										    KEYMAP["pg_down"] - 1 << 9,
										):
												WIN_CH_BUFFER.append(chr(1_26					)					)
										__SCREAMING_SNAKE_CASE       :		List[str]           =		chr(KEYMAP["""esc"""]					)
								except KeyError:
										__SCREAMING_SNAKE_CASE       :		Dict           =		cha[1]
						else:
								__SCREAMING_SNAKE_CASE       :		Tuple           =		ch.decode(_lowerCamelCase					)
				else:
						__SCREAMING_SNAKE_CASE       :		Optional[Any]           =		WIN_CH_BUFFER.pop(0					)
		elif os.name == "posix":
				import termios
				import tty

				__SCREAMING_SNAKE_CASE       :		Optional[Any]           =		sys.stdin.fileno()
				__SCREAMING_SNAKE_CASE       :		int           =		termios.tcgetattr(_lowerCamelCase					)
				try:
						tty.setraw(_lowerCamelCase					)
						__SCREAMING_SNAKE_CASE       :		Any           =		sys.stdin.read(1					)
				finally:
						termios.tcsetattr(_lowerCamelCase       ,      termios.TCSADRAIN       ,      _lowerCamelCase					)
		return ch


def 				lowerCAmelCase_   (	):
		__SCREAMING_SNAKE_CASE       :		Dict           =		get_raw_chars()
		if ord(_lowerCamelCase					) in [KEYMAP["interrupt"], KEYMAP["newline"]]:
				return char

		elif ord(_lowerCamelCase					) == KEYMAP["esc"]:
				__SCREAMING_SNAKE_CASE       :		List[Any]           =		get_raw_chars()
				if ord(_lowerCamelCase					) == KEYMAP["mod_int"]:
						__SCREAMING_SNAKE_CASE       :		str           =		get_raw_chars()
						if ord(_lowerCamelCase					) >= KEYMAP["arrow_begin"] - ARROW_KEY_FLAG and ord(_lowerCamelCase					) <= KEYMAP["arrow_end"] - ARROW_KEY_FLAG:
								return chr(ord(_lowerCamelCase					) + ARROW_KEY_FLAG					)
						else:
								return KEYMAP["undefined"]
				else:
						return get_raw_chars()

		else:
				if char in string.printable:
						return char
				else:
						return KEYMAP["undefined"]



__lowerCAmelCase		       =							{
    '''A''': ['''B''', '''C''', '''E'''],
    '''B''': ['''A''', '''D''', '''E'''],
    '''C''': ['''A''', '''F''', '''G'''],
    '''D''': ['''B'''],
    '''E''': ['''A''', '''B''', '''D'''],
    '''F''': ['''C'''],
    '''G''': ['''C'''],
}




def    snake_case_     (  snake_case			,							snake_case			,							snake_case     )  ->				list[str]:
       lowercase__:   int  			=   set()
       # keep track of all the paths to be checked
       lowercase__:   Optional[int]  			=   [[start]]

       # return path if start is goal
       if start == goal:
              return [start]

       # keeps looping until all possible paths have been checked
       while queue:
              # pop the first path from the queue
              lowercase__:   List[Any]  			=   queue.pop(0     )
              # get the last node from the path
              lowercase__:   Optional[int]  			=   path[-1]
              if node not in explored:
                     lowercase__:   Optional[Any]  			=   graph[node]
                     # go through all neighbour nodes, construct a new path and
                     # push it into the queue
                     for neighbour in neighbours:
                            lowercase__:   Tuple  			=   list(snake_case     )
                            new_path.append(snake_case     )
                            queue.append(snake_case     )
                            # return path if neighbour is goal
                            if neighbour == goal:
                                   return new_path

            # mark node as explored
                     explored.add(snake_case     )

    # in case there's no path between the 2 nodes
       return []




def    snake_case_     (  snake_case			,							snake_case			,							snake_case     )  ->				int:
       if not graph or start not in graph or target not in graph:
              return -1
       if start == target:
              return 0
       lowercase__:   Tuple  			=   [start]
       lowercase__:   List[Any]  			=   set(snake_case     )
       # Keep tab on distances from `start` node.
       lowercase__:   Tuple  			=   {start: 0, target: -1}
       while queue:
              lowercase__:   Dict  			=   queue.pop(0     )
              if node == target:
                     lowercase__:   str  			=   (
                         dist[node] if dist[target] == -1 else min(dist[target]			,							dist[node]     )
                     )
              for adjacent in graph[node]:
                     if adjacent not in visited:
                            visited.add(snake_case     )
                            queue.append(snake_case     )
                            lowercase__:   List[str]  			=   dist[node] + 1
       return dist[target]


if __name__ == "__main__":
 print(bfs_shortest_path(demo_graph, '''G''', '''D'''))  # returns ['G', 'C', 'A', 'B', 'D']
 print(bfs_shortest_path_distance(demo_graph, '''G''', '''D'''))  # returns 4


