一直爆零，蒟蒻求助！

#include<bits/stdc++.h>
using namespace std;
int main(){
    int n,m;int s[1005] = {0};
    cin >> n;
    if(n == 0) {
    cout << 0<<endl;goto returnhere;}

    for(int i = 0;i<n;++i){
        cin >> s[i];
    }
    sort(s,s+n);
    for(int i = 0;i < n;i++){
        m += s[i];
    }
    m = m - s[n - 1] - s[0];
    cout <<fixed<<setprecision(2)<<m/double(n-2) <<endl;
    returnhere:
    return 0;
}