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Divide Array Into Equal Pairs
You are given an integer array nums consisting of 2 * n integers.
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.
Example 1
Input: nums = [3,2,3,2,2,2]
Output: true
Explanation: There are 6 elements in nums, so they should be divided into 6 / 2 = 3 pairs. If nums is divided into the pairs (2, 2), (3, 3), and (2, 2), it will satisfy all the conditions.
Example 2
Input: nums = [1,2,3,4]
Output: false
Explanation: There is no way to divide nums into 4 / 2 = 2 pairs such that the pairs satisfy every condition.
Constraints
- nums.length == 2 * n
- 1 <= n <= 500
- 1 <= nums[i] <= 500
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