C :

#include<stdio.h>
#include<string.h>
int N;
struct Student
{
	char num[20];
	char name[20];
	int score[3];
	int aver;
};
int main()
{
    int ss[N];
    scanf("%d",&N);
    memset(ss,0,sizeof(0));
	void input(struct Student stu[]);
	struct Student max(struct Student stu[]);
	void print(struct Student stu);
	struct Student stu[N],*p=stu;
    input(p);
    for(int i=0;i<3;i++)
    {
        ss[i]=0;
        for(int j = 0 ;j< N;j++)
        ss[i]+=stu[j].score[i];
    }
    printf("%d %d %d\n",ss[0]/N,ss[1]/N,ss[2]/N);
	print(max(p));
	return 0;
}
	void input(struct Student stu[])
	{
		int i;
		for(i=0;i<N;i++)
		{
			scanf("%s %s %d %d %d",stu[i].num,stu[i].name,&stu[i].score[0],&stu[i].score[1],&stu[i].score[2]);
			stu[i].aver=(stu[i].score[0]+stu[i].score[1]+stu[i].score[2])/3;
		}

	}
	struct Student max(struct Student stu[])
	{
		int i,m=0;
		for(i=0;i<N;i++)
			if(stu[i].aver>stu[m].aver)
				m=i;
			return stu[m];
	}
	void print(struct Student stu)
	{
		printf("%s %s %d %d %d\n",stu.num,stu.name,stu.score[0],stu.score[1],stu.score[2]);
	}

C++ :

#include<stdlib.h>
#include<stdio.h>
struct student
{
    char num[4];
    char name[10];
    int great[3];
    int sum;


};
int main()
{
    int n,m,i,j,sum1=0,sum2=0,sum3=0;
    scanf("%d",&n);
    struct student a[n],temp;
    temp.sum=0;
    for(i=0; i<n; i++)
    {
        scanf("%s",&a[i].num);
        scanf("%s",&a[i].name);
        scanf("%d%d%d",&a[i].great[0],&a[i].great[1],&a[i].great[2]);
        a[i].sum=a[i].great[0]+a[i].great[1]+a[i].great[2];
    }

    for(i=0; i<n; i++)
    {
        sum1+=a[i].great[0];
        sum2+=a[i].great[1];
        sum3+=a[i].great[2];
    }
    printf("%d %d %d\n",sum1/n,sum2/n,sum3/n);
    for(i=0; i<n; i++)
        if(a[i].sum>temp.sum)
            temp=a[i];

    printf("%s ",temp.num);
    printf("%s ",temp.name);
    printf("%d %d %d\n",temp.great[0],temp.great[1],temp.great[2]);
    return 0;
}