1491. Average Salary Excluding the Minimum and Maximum Salary

Easy

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

Constraints:

• 3 <= salary.length <= 100

• 1000 <= salary[i] <= 106

• All the integers of salary are unique.

解題

這題用變數紀錄min和max最後再扣掉時間複雜度應該會比較好，但我選擇先排序，程式看起來比較精簡：

func average(salary []int) float64 {
    sort.Ints(salary)

    sum := 0
    for i:=1;i<len(salary)-1; i++ {
        sum += salary[i]
    }

    return float64(sum)/float64(len(salary)-2)
}