#include <stdio.h>
#include <stdlib.h>

struct Ank{
    char surname[40];
    char name[40];
    char second_name[40];
    int number_of_school;
    int number_of_class;
    int marks[5];
    float avarage_mark;
};
int main()
{
    int count;
    printf("Enter the count of students: ");
    scanf("%d", &count);
    struct Ank students[count];
    for (int i=0;i<count;i++){
        printf("Enter the surname:" );
        scanf("%s", students[i].surname);
        printf("Enter the name: ");
        scanf("%s",students[i].name);
        printf("Enter the second_name: ");
        scanf("%s", students[i].second_name);
        printf("Enter the number of school: ");
        scanf("%d", &students[i].number_of_school);
        printf("Enter the number of class: ");
        scanf("%d", &students[i].number_of_class);
        students[i].avarage_mark = 0;
        for (int j=0;j<5;j++){
            printf("Enter the %d mark: ", j+1);
            scanf("%d", &students[i].marks[j]);
            students[i].avarage_mark+= students[i].marks[j];
        }
        students[i].avarage_mark /=5;
        printf("---------------------------------------\n");
    }
    for (int i=0;i<count;i++){
        for (int j=0;j<count;j++){
            if (students[i].avarage_mark>students[j].avarage_mark){
                struct Ank tmp = students[i];
                students[i] = students[j];
                students[j] = tmp;
            }
        }
    }
    int tmp;
    if (count > 3){
        tmp = 3;
    }else{
        tmp = count;
    }
    for (int i=0;i<tmp;i++){
        printf("%s\n", students[i].surname);
    }
    printf("------------------------------------\n");
    for (int i=0;i<count;i++){
        if (strlen(students[i].surname)>7){
            printf("%s\n", students[i].surname);
        }
    }
    return 0;
}