hdu_2014 青年歌手大奖赛_评委会打分

import java.text.DecimalFormat;
import java.util.Scanner;

/**
* Created by feyman1120 on 2017/11/23.
*/
public class Main {
public static void main(String [] args){

Scanner scan = new Scanner(System.in);
while (scan.hasNext()){
int m = scan.nextInt();
if (0 == m){
break;
}
double minV = 1e10;
double maxV = 0;
double sum = 0.0;

for (int i = 0; i < m; ++i){
double x = scan.nextDouble();
sum += x;
minV = Math.min(minV, x);
maxV = Math.max(maxV, x);
}
sum -= minV + maxV;
sum /= (m - 2);
DecimalFormat df = new DecimalFormat("#0.00");
System.out.println(df.format(sum));
}

}
}