求助！！

#include<bits/stdc++.h>
using namespace std;
#define maxn 1001
int a[maxn];
int main () {
	int n;
	cin >> n;
	for ( int i = 1; i <= n; i++ ) cin >> a[i];
	int max_num, min_num;
	for ( int i = 1 ; i <= n; i++ ) {
		if ( i == 1 ) {
			max_num = a[i];
			min_num = a[i];
		} 
		if ( a[i] > max_num ) max_num = a[i];
		if ( a[i] < min_num ) min_num = a[i];
	}
	double sum = 0;
	for ( int i = 1; i <= n; i++ ) {
		if ( a[i] == max_num || min_num ) continue;
		sum += a[i];
	}
	double num = 0;
	for ( int i = 1; i <= n; i++ ) {
		if ( a[i] == max_num || min_num ) continue;
		if ( a[i] > 0 ) num += 1;
	}
	printf ( "%2lf", sum / num );
	return 0;
}