int main()
{
    int Grade;
    int Grades[100];
    scanf("%d",&Grade);
    int Max=Grade,i=0,Min=Grade,Sum=0;
    while(Grade!=-1){
        Grades[i]=Grade;
        int j;
        for (j=0;j<i;j++){
            if (Grades[j]>Max)
                Max=Grades[j];
        }
        for (j=0;j<i;j++){
            if (Grades[j]<Min)
                Min=Grades[j];
}
        Sum+=Grade;
        scanf("%d",&Grade);
        i++;
    }
    printf("Maximum is: %d \n",Max);
    printf("Minimum is: %d \n",Min);
    printf("Average is: %d \n",Sum/i);
    return 0;
}