只得了30分，求助

#include<iostream>
#include<iomanip>
using namespace std;
double a[301]; 
int main(){
    double b,c,max1=0,max2=0,min=100000,sum=0;
    cin>>b;
    for(int i=1;i<=b;i++){
        cin>>a[i];
        sum+=a[i];
        if(a[i]>max1){
            max1=a[i];
        }
        if(a[i]<min){
            min=a[i];
        }
    }
    c=(sum-max1-min)/(b-2);
    cout<<fixed<<setprecision(2)<<c<<' ';   
    for(int i=1;i<=b;i++){
    	if(a[i]>max2 && a[i]!=max1 && a[i]!=min){
    		max2=a[i];
		}
	}
    cout<<fixed<<setprecision(2)<<max2-(sum-max1-min)/(b-2)<<endl;
    return 0;
}