We want to split a group of n people (labeled from 1 to n) into two groups of any size. Each person may dislike some other people, and they should not go into the same group.
Given the integer n and the array dislikes where dislikes[i] = [ai, bi] indicates that the person labeled ai does not like the person labeled bi, return true if it is possible to split everyone into two groups in this way.
\n
Example 1:
\n\n\nInput: n = 4, dislikes = [[1,2],[1,3],[2,4]]\nOutput: true\nExplanation: The first group has [1,4], and the second group has [2,3].\n\n\n
Example 2:
\n\n\nInput: n = 3, dislikes = [[1,2],[1,3],[2,3]]\nOutput: false\nExplanation: We need at least 3 groups to divide them. We cannot put them in two groups.\n\n\n
\n
Constraints:
\n\n1 <= n <= 20000 <= dislikes.length <= 104dislikes[i].length == 21 <= ai < bi <= ndislikes are unique.给定一组 n 人（编号为 1, 2, ..., n）， 我们想把每个人分进任意大小的两组。每个人都可能不喜欢其他人，那么他们不应该属于同一组。
给定整数 n 和数组 dislikes ，其中 dislikes[i] = [ai, bi] ，表示不允许将编号为 ai 和 bi的人归入同一组。当可以用这种方法将所有人分进两组时，返回 true；否则返回 false。
\n\n
示例 1：
\n\n\n输入：n = 4, dislikes = [[1,2],[1,3],[2,4]]\n输出：true\n解释：group1 [1,4], group2 [2,3]\n\n\n
示例 2：
\n\n\n输入：n = 3, dislikes = [[1,2],[1,3],[2,3]]\n输出：false\n\n\n
示例 3：
\n\n\n输入：n = 5, dislikes = [[1,2],[2,3],[3,4],[4,5],[1,5]]\n输出：false\n\n\n
\n\n
提示：
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