AC了，比较出的问题
```cpp
#include <iostream>
#include <algorithm>
#include <cstdio>
using namespace std;
int fen[21];
int main() {
int n, m;
double ans = 0;
cin >> n >> m;
for (int i = 0; i < n; i++) {
int sum = 0;
for (int j = 0; j < m; j++) {
cin >> fen[j];
}
sort(fen, fen + m);
for (int j = 1; j < m - 1; j++) {
sum += fen[j];
}
if (sum / (m - 2.0)*1.0 > ans) {
ans = sum / (m - 2.0)*1.0;
}
}
printf("%.2lf", ans);
return 0;
}
```
by zky06 @ 2020-09-03 18:11:11
感谢，已AC
by _tyc @ 2020-09-05 13:55:18