Average Salary Excluding the Minimum and Maximum Salary LeetCode solution in C++

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class Solution {
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 public:
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  double average(vector<int> &salary) {
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    int n = salary.size();
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    double ans = 0;
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    sort(salary.begin(), salary.end());
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    for (int i = 1; i < n - 1; i++) {
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      ans += salary[i];
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    }
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    return ans / (n - 2);
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  }
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};