1491. Average Salary Excluding the Minimum and Maximum Salary

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題目敘述

You are given an array of unique integers salary where salary[i] is the salary of the ith employee.

Return the average salary of employees excluding the minimum and maximum salary. Answers within 10-5 of the actual answer will be accepted.

Example 1:

Input: salary = [4000,3000,1000,2000] Output: 2500.00000 Explanation: Minimum salary and maximum salary are 1000 and 4000 respectively. Average salary excluding minimum and maximum salary is (2000+3000) / 2 = 2500

Example 2:

Input: salary = [1000,2000,3000] Output: 2000.00000 Explanation: Minimum salary and maximum salary are 1000 and 3000 respectively. Average salary excluding minimum and maximum salary is (2000) / 1 = 2000

解題思路

Solution

import java.util.Arrays;

class Solution {
    public double average(int[] salary) {
        Arrays.sort(salary);
        long sum = 0;
        for(int i = 1; i < salary.length - 1; i++){
            sum += salary[i];
        }
        
        return sum / (salary.length - 2 * 1.0);
    }
}