How I define - for loop

How to improve this code more efficiently? In other words, how to be accepted in interview?

int main(void)
{
	int scores[3];
    
    scores[0] = get_int("Score: ");
    scores[1] = get_int("Score: ");
    scores[2] = get_int("Score: ");
    
    printf("Average: %f\n", (scores[0] + scores[1] + scores[2] / 3.0);

Obviously, get_int can be replaced to something else. To reduce that repetitive one.

 

In this case, the expert said they will use loop.

int main(void)
{
	int scores[3];
    
	for (int i = 0; i < 3; i++)
    {
    	scores[i] = get_int("Score: ");
    }
    
    printf("Average: %f\n", (scores[0] + scores[1] + scores[2] / 3.0);

And still improvable! How?

int main(void)
{
	int n = get_int("How many scores? ");
    
    int scores[n];
    
	for (int i = 0; i < n; i++)
    {
    	scores[i] = get_int("Score: ");
    }
    
    printf("Average: %f\n", (scores[0] + scores[1] + scores[2] / 3.0);

Now, whole program works dynamically. This process is dynamic.

Although this is probably basic, this is important to reduce the size of its data.