1491.go

// Source: https://leetcode.com/problems/average-salary-excluding-the-minimum-and-maximum-salary
// Title: Average Salary Excluding the Minimum and Maximum Salary
// Difficulty: Easy
// Author: Mu Yang <http://muyang.pro>

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// 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] <= 10^6
//   All the integers of salary are unique.
//
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

package main

func average(salary []int) float64 {
	sum := 0
	min, max := salary[0], salary[0]
	for _, v := range salary {
		sum += v
		min = _min(min, v)
		max = _max(max, v)
	}
	return float64(sum-min-max) / float64(len(salary)-2)
}

func _max(a, b int) int {
	if a > b {
		return a
	}
	return b
}

func _min(a, b int) int {
	if a < b {
		return a
	}
	return b
}