重点是四舍五入。。没了
#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
int main() {
int N,M;
scanf("%d %d",&N,&M);
for(int i=0; i<N; i++) {
int a,sum=0;
int g1=0,g2;
cin>>g2;
vector <int> v;
for(int j=0; j<N-1; j++) {
scanf("%d",&a);
if(a>=0 &&a<=M) v.push_back(a);
}
sort(v.begin(),v.end());
for(int i=1; i<v.size()-1; i++) sum+=v[i];
printf("%d\n",(int)((sum*1.0/(v.size()-2)+g2)/2+0.5));
}
return 0;
}