






'''simple docstring'''


import heapq






def   lowerCAmelCase__			(					SCREAMING_SNAKE_CASE__       ,		SCREAMING_SNAKE_CASE__       ,		SCREAMING_SNAKE_CASE__		):
 __a    :	Optional[Any]									=						[(0, start)]  # cost from start node,end node
 __a    :	str									=						set()
 while heap:
  ((__a)			,    (__a))    :	Optional[Any]									=						heapq.heappop(SCREAMING_SNAKE_CASE__		)
  if u in visited:
   continue
  visited.add(SCREAMING_SNAKE_CASE__		)
  if u == end:
   return cost
  for v, c in graph[u]:
   if v in visited:
    continue
   __a    :	Any									=						cost + c
   heapq.heappush(SCREAMING_SNAKE_CASE__       ,		(next_item, v)		)
 return -1


SCREAMING_SNAKE_CASE_				      =		{
    'A': [['B', 2], ['C', 5]],
    'B': [['A', 2], ['D', 3], ['E', 1], ['F', 1]],
    'C': [['A', 5], ['F', 3]],
    'D': [['B', 3]],
    'E': [['B', 4], ['F', 3]],
    'F': [['C', 3], ['E', 3]],
}
SCREAMING_SNAKE_CASE_				      =		{
    'B': [['C', 1]],
    'C': [['D', 1]],
    'D': [['F', 1]],
    'E': [['B', 1], ['F', 3]],
    'F': [],
}
SCREAMING_SNAKE_CASE_				      =		{
    'B': [['C', 1]],
    'C': [['D', 1]],
    'D': [['F', 1]],
    'E': [['B', 1], ['G', 2]],
    'F': [],
    'G': [['F', 1]],
}

SCREAMING_SNAKE_CASE_				      =		dijkstra(G, "E", "C")
print(short_distance)  # E -- 3 --> F -- 3 --> C == 6

SCREAMING_SNAKE_CASE_				      =		dijkstra(Ga, "E", "F")
print(short_distance)  # E -- 3 --> F == 3

SCREAMING_SNAKE_CASE_				      =		dijkstra(Ga, "E", "F")
print(short_distance)  # E -- 2 --> G -- 1 --> F == 3

if __name__ == "__main__":
  import doctest

  doctest.testmod()












'''simple docstring'''


def   lowerCAmelCase__			(					SCREAMING_SNAKE_CASE__ = 30		):
 __a    :	Tuple									=						exponent + 2
 __a    :	str									=						(1 + 5**0.5) / 2
 __a    :	Any									=						(phi**fibonacci_index - (phi - 1) ** fibonacci_index) / 5**0.5

 return int(SCREAMING_SNAKE_CASE__		)


if __name__ == "__main__":
  print(F"{solution() = }")




