You are given an integer array nums. You need to ensure that the elements in the array are distinct. To achieve this, you can perform the following operation any number of times:
Note that an empty array is considered to have distinct elements. Return the minimum number of operations needed to make the elements in the array distinct.
\n\n\n
Example 1:
\n\nInput: nums = [1,2,3,4,2,3,3,5,7]
\n\nOutput: 2
\n\nExplanation:
\n\n[4, 2, 3, 3, 5, 7].[3, 5, 7], which has distinct elements.Therefore, the answer is 2.
\nExample 2:
\n\nInput: nums = [4,5,6,4,4]
\n\nOutput: 2
\n\nExplanation:
\n\n[4, 4].Therefore, the answer is 2.
\nExample 3:
\n\nInput: nums = [6,7,8,9]
\n\nOutput: 0
\n\nExplanation:
\n\nThe array already contains distinct elements. Therefore, the answer is 0.
\n\n
Constraints:
\n\n1 <= nums.length <= 1001 <= nums[i] <= 100给你一个整数数组 nums，你需要确保数组中的元素 互不相同 。为此，你可以执行以下操作任意次：
注意：空数组也视作为数组元素互不相同。返回使数组元素互不相同所需的 最少操作次数 。
\n\n\n\n
\n\n
示例 1：
\n\n输入： nums = [1,2,3,4,2,3,3,5,7]
\n\n输出： 2
\n\n解释：
\n\n[4, 2, 3, 3, 5, 7]。[3, 5, 7]，此时数组中的元素互不相同。因此，答案是 2。
\n示例 2：
\n\n输入： nums = [4,5,6,4,4]
\n\n输出： 2
\n\n解释：
\n\n[4, 4]。因此，答案是 2。
\n示例 3：
\n\n输入： nums = [6,7,8,9]
\n\n输出： 0
\n\n解释：
\n\n数组中的元素已经互不相同，因此不需要进行任何操作，答案是 0。
\n\n\n
提示：
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