#include <stdio.h>
#include <stdlib.h>
#include<string.h>
#define SIZE 20
typedef char string [9];
typedef struct
{
    string course_name;
    int n_o_s;
    double avg;
} course;

void read(course [],int *);

int main()
{
    double maxi;
    int digit;
    char x;
    int i;
    int size=0;
    course comp[SIZE];
    double years_avg[4]= {0};
    int no_of_students[4]= {0};
    read(comp,&size);

    for(i=0; i<size; i++)
    {
        x=comp[i].course_name[4];
        digit=x-'0';
        years_avg[digit-1]+=(comp[i].avg*comp[i].n_o_s);
        no_of_students[digit-1]+=comp[i].n_o_s;
    }
    for(i=0; i<4; i++)
    {

        years_avg[i]/=no_of_students[i];
    }
    maxi=years_avg[0];
    for(i=1; i<4; i++)
    {
        if(maxi<years_avg[i])
        {
            maxi=years_avg[i];
        }
    }
    if(no_of_students[0]==0)
    {
        printf("First year courses avg = No courses\n");
    }
    else
        printf("First year courses avg = %.2f\n",years_avg[0]);
    if(no_of_students[1]==0)
    {
        printf("Second year courses avg = No courses\n");
    }
    else
        printf("Second year courses avg = %.2f\n",years_avg[1]);
    if(no_of_students[2]==0)
    {
        printf("Third year courses avg = No courses\n");
    }
    else
        printf("Third year courses avg = %.2f\n",years_avg[2]);
    if(no_of_students[3]==0)
    {
        printf("Forth year courses avg = No courses\n");
    }
    else
        printf("Forth year courses avg = %.2f\n",years_avg[3]);


    printf("The highest average = %.2f",maxi);
    return 0;
}
void read(course x[],int *size)
{
    int i=0;
    FILE *fp;
    fp=fopen("course_info.txt","r");
    while (fscanf(fp,"%s",x[i].course_name)!=EOF)
    {
        fscanf(fp,"%d%lf",&x[i].n_o_s,&x[i].avg);
        i++;
        (*size)++;
    }
    fclose(fp);

}