1491. 去掉最低工资和最高工资后的工资平均值

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