LeetCode 841. Keys and Rooms - Python

[@maged_helmy]

Code:
def canVisitAllRooms(self, rooms: List[List[int]]) -> bool:


stack = [0]
seen = set(stack)

while stack:
idx = stack.pop()

for j in rooms[idx]:
if j not in seen:
stack.append(j)
seen.add(j)

return len(seen) == len(rooms)

[@omarabdelkader5214]

thanks for this great illustration