from queue import Queue n = int(input()) rooms = [] for _ in range(n): portals = set(map(int, input().split(','))) rooms.append(portals) a, b = map(int, input().split(',')) def bfs(start, target): visited = set() q = Queue() q.put((start, 0)) visited.add(start) while not q.empty(): room, steps = q.get() if room == target: return steps for neighbor_room, portals in enumerate(rooms): if neighbor_room not in visited and portals & rooms[room]: visited.add(neighbor_room) q.put((neighbor_room, steps + 1)) return -1 print(bfs(a-1, b-1))请给以上代码做注释
时间: 2023-12-02 08:03:39 浏览: 48
TypeError: _queue_reduction(): incompatible function arguments.
```
from queue import Queue # 导入队列模块
n = int(input()) # 输入房间数
rooms = [] # 初始化房间列表
for _ in range(n):
portals = set(map(int, input().split(','))) # 输入每个房间的传送门集合
rooms.append(portals) # 将传送门集合加入房间列表中
a, b = map(int, input().split(',')) # 输入起始房间和目标房间
def bfs(start, target):
visited = set() # 初始化已访问的房间集合
q = Queue() # 初始化队列
q.put((start, 0)) # 将起始房间和步数加入队列
visited.add(start) # 将起始房间加入已访问的房间集合
while not q.empty(): # 队列非空
room, steps = q.get() # 弹出队头元素,即当前房间和步数
if room == target: # 如果当前房间是目标房间,返回步数
return steps
for neighbor_room, portals in enumerate(rooms): # 遍历所有房间,找到当前房间相邻的房间
if neighbor_room not in visited and portals & rooms[room]: # 如果相邻房间未访问且有传送门与当前房间相连
visited.add(neighbor_room) # 将相邻房间添加到已访问的房间集合中
q.put((neighbor_room, steps + 1)) # 将相邻房间和步数加入队列
return -1 # 如果无法到达目标房间,返回 -1
print(bfs(a-1, b-1)) # 输出起始房间到目标房间的步数
```
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