There are n rooms labeled from 0 to n - 1 and all the rooms are locked except for room 0. Your goal is to visit all the rooms. However, you cannot enter a locked room without having its key.
When you visit a room, you may find a set of distinct keys in it. Each key has a number on it, denoting which room it unlocks, and you can take all of them with you to unlock the other rooms.
\n\nGiven an array rooms where rooms[i] is the set of keys that you can obtain if you visited room i, return true if you can visit all the rooms, or false otherwise.
\n
Example 1:
\n\n\nInput: rooms = [[1],[2],[3],[]]\nOutput: true\nExplanation: \nWe visit room 0 and pick up key 1.\nWe then visit room 1 and pick up key 2.\nWe then visit room 2 and pick up key 3.\nWe then visit room 3.\nSince we were able to visit every room, we return true.\n\n\n
Example 2:
\n\n\nInput: rooms = [[1,3],[3,0,1],[2],[0]]\nOutput: false\nExplanation: We can not enter room number 2 since the only key that unlocks it is in that room.\n\n\n
\n
Constraints:
\n\nn == rooms.length2 <= n <= 10000 <= rooms[i].length <= 10001 <= sum(rooms[i].length) <= 30000 <= rooms[i][j] < nrooms[i] are unique.Compiled with clang 11 using the latest C++ 20 standard.
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