洛谷-歌唱比赛

#include <bits/stdc++.h>
using namespace std;
const int N = 9999;//懂得都懂。
int a[N];int main () 
{int n, m;double sum = 0, max = 0;//看题，有小数点。cin >> n >> m;for (int i = 0; i < n; i++) //输入n组数据。{for (int j = 0; j < m; j++)//输入每组成绩。{cin >> a[j];}sort(a, a + m);//排序。for (int k = 1; k < m - 1; k++) //去掉开头和结尾。{sum = sum + a[k];//累加。}sum = sum / (m - 2);//平均数。if (sum > max) {max = sum;//找最大值。}sum = 0;//归零。a[N] = {0};}printf("%.2lf", max);return 0;
}