You are given an integer array nums consisting of 2 * n integers.
You need to divide nums into n pairs such that:
Return true if nums can be divided into n pairs, otherwise return false.
\n
Example 1:
\n\n\nInput: nums = [3,2,3,2,2,2]\nOutput: true\nExplanation: \nThere are 6 elements in nums, so they should be divided into 6 / 2 = 3 pairs.\nIf nums is divided into the pairs (2, 2), (3, 3), and (2, 2), it will satisfy all the conditions.\n\n\n
Example 2:
\n\n\nInput: nums = [1,2,3,4]\nOutput: false\nExplanation: \nThere is no way to divide nums into 4 / 2 = 2 pairs such that the pairs satisfy every condition.\n\n\n
\n
Constraints:
\n\nnums.length == 2 * n1 <= n <= 5001 <= nums[i] <= 500给你一个整数数组 nums ，它包含 2 * n 个整数。
你需要将 nums 划分成 n 个数对，满足：
如果可以将 nums 划分成 n 个数对，请你返回 true ，否则返回 false 。
\n\n
示例 1：
\n\n\n输入：nums = [3,2,3,2,2,2]\n输出：true\n解释：\nnums 中总共有 6 个元素，所以它们应该被划分成 6 / 2 = 3 个数对。\nnums 可以划分成 (2, 2) ，(3, 3) 和 (2, 2) ，满足所有要求。\n\n\n示例 2：
\n\n\n输入：nums = [1,2,3,4]\n输出：false\n解释：\n无法将 nums 划分成 4 / 2 = 2 个数对且满足所有要求。\n\n\n
\n\n
提示：
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