There is an undirected graph with n nodes, where each node is numbered between 0 and n - 1. You are given a 2D array graph, where graph[u] is an array of nodes that node u is adjacent to. More formally, for each v in graph[u], there is an undirected edge between node u and node v. The graph has the following properties:
graph[u] does not contain u).graph[u] does not contain duplicate values).v is in graph[u], then u is in graph[v] (the graph is undirected).u and v such that there is no path between them.A graph is bipartite if the nodes can be partitioned into two independent sets A and B such that every edge in the graph connects a node in set A and a node in set B.
Return true if and only if it is bipartite.
\n
Example 1:
\n![\"\"](\"https://assets.leetcode.com/uploads/2020/10/21/bi2.jpg\")
\n\nInput: graph = [[1,2,3],[0,2],[0,1,3],[0,2]]\nOutput: false\nExplanation: There is no way to partition the nodes into two independent sets such that every edge connects a node in one and a node in the other.\n\n
Example 2:
\n![\"\"](\"https://assets.leetcode.com/uploads/2020/10/21/bi1.jpg\")
\n\nInput: graph = [[1,3],[0,2],[1,3],[0,2]]\nOutput: true\nExplanation: We can partition the nodes into two sets: {0, 2} and {1, 3}.\n\n\n
Constraints:
\n\ngraph.length == n1 <= n <= 1000 <= graph[u].length < n0 <= graph[u][i] <= n - 1graph[u] does not contain u.graph[u] are unique.graph[u] contains v, then graph[v] contains u.n 个节点。其中每个节点都有一个介于 0 到 n - 1 之间的唯一编号。给你一个二维数组 graph ，其中 graph[u] 是一个节点数组，由节点 u 的邻接节点组成。形式上，对于 graph[u] 中的每个 v ，都存在一条位于节点 u 和节点 v 之间的无向边。该无向图同时具有以下属性：\ngraph[u] 不包含 u）。graph[u] 不包含重复值）。v 在 graph[u] 内，那么 u 也应该在 graph[v] 内（该图是无向图）u 和 v 之间可能不存在一条连通彼此的路径。二分图 定义：如果能将一个图的节点集合分割成两个独立的子集 A 和 B ，并使图中的每一条边的两个节点一个来自 A 集合，一个来自 B 集合，就将这个图称为 二分图 。
如果图是二分图，返回 true ；否则，返回 false 。
\n\n
示例 1：
\n\n\n输入：graph = [[1,2,3],[0,2],[0,1,3],[0,2]]\n输出：false\n解释：不能将节点分割成两个独立的子集，以使每条边都连通一个子集中的一个节点与另一个子集中的一个节点。\n\n示例 2：
\n\n\n输入：graph = [[1,3],[0,2],[1,3],[0,2]]\n输出：true\n解释：可以将节点分成两组: {0, 2} 和 {1, 3} 。\n\n\n\n
提示：
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