




def 					lowerCamelCase__       (						A__       :					list[list[int]]  ,			A__       :					int  ,			A__       :					int  ,			A__       :					set	):





       '''simple docstring'''



       __lowerCamelCase,   __lowerCamelCase   =						len(A__	), len(grid[0]	)
       if (
           min(A__  ,			A__	) < 0
           or row == row_length
           or col == col_length
           or (row, col) in visit
           or grid[row][col] == 1
       ):
              return 0
       if row == row_length - 1 and col == col_length - 1:
              return 1

       visit.add((row, col)	)

       __lowerCamelCase   =						0
       count += depth_first_search(A__  ,			row + 1  ,			A__  ,			A__	)
       count += depth_first_search(A__  ,			row - 1  ,			A__  ,			A__	)
       count += depth_first_search(A__  ,			A__  ,			col + 1  ,			A__	)
       count += depth_first_search(A__  ,			A__  ,			col - 1  ,			A__	)

       visit.remove((row, col)	)
       return count


if __name__ == "__main__":
       import doctest

       doctest.testmod()



"""simple docstring"""





def 						_lowerCAmelCase				(				UpperCamelCase_				):

		if isinstance(UpperCamelCase_  ,				UpperCamelCase_				):
				raise TypeError("""'float' object cannot be interpreted as an integer"""				)
		if isinstance(UpperCamelCase_  ,				UpperCamelCase_				):
				raise TypeError("""'str' object cannot be interpreted as an integer"""				)

		if num == 0:
				return "0b0"

		__SCREAMING_SNAKE_CASE            = False

		if num < 0:
				__SCREAMING_SNAKE_CASE            = True
				__SCREAMING_SNAKE_CASE            = -num

		__SCREAMING_SNAKE_CASE            = []
		while num > 0:
				binary.insert(0  ,				num % 2				)
				num >>= 1

		if negative:
				return "-0b" + "".join(str(UpperCamelCase_				) for e in binary				)

		return "0b" + "".join(str(UpperCamelCase_				) for e in binary				)


if __name__ == "__main__":
							import doctest

							doctest.testmod()




