PAT 乙级 1077 互评成绩计算 (20分)

#include<iostream>
#include<cstdio>
#include<string>
#include<vector>
#include<algorithm>
#include<cmath>
using namespace std;
int main(){
	int N = 0, M = 0,tgrade=0;
	cin >> N >> M;
	for (int i = 0; i < N; i++){
		cin >> tgrade;
		vector<int> sgrade;
		double sum = 0;
		for (int j = 1; j < N; j++){
			int temp = 0;
			cin >> temp;
			if (temp >= 0 && temp <= M){
				sgrade.push_back(temp);
			}
		}
		sort(sgrade.begin(), sgrade.end());
		for (int j = 1; j < sgrade.size() - 1; j++){
			sum += sgrade[j];
		}
		sum = sum / (sgrade.size() - 2);
		sum = (sum + tgrade) / 2.0;
		int x = round(sum);
		printf("%d\n", x);
	}
	return 0;
}