PROGRAMMING:Output all numbers greater than the average
This problem requires the preparation of procedures, the input of $$n $$integers into the array $$a $, and then calculate the average value of these numbers, and then output all the numbers greater than the average value.
###Input format:
Enter a positive integer $$n $($$1 / Le n / Le 10 $$) on line 1 and $$n $$integers separated by spaces on line 2. The topic guarantees that the data does not exceed the range of long integers.
###Output format:
The output gives the average value on line 1, retaining 2 decimal places. In the second line, output all numbers greater than the average value, and there is a space after each number; If there is no number that satisfies the condition, an empty line is output.
If the input n is not in the valid range, output "invalid." in one line.
###Input sample 1:
```in
ten
55 23 8 11 22 89 0 -1 78 186
```
###Output sample 1:
```out
forty-seven point one zero
55 89 78 186
```
###Input sample 2:
```
0
```
###Output sample 2:
```
Invalid.
```
answer：If there is no answer, please comment
###Input format:
Enter a positive integer $$n $($$1 / Le n / Le 10 $$) on line 1 and $$n $$integers separated by spaces on line 2. The topic guarantees that the data does not exceed the range of long integers.
###Output format:
The output gives the average value on line 1, retaining 2 decimal places. In the second line, output all numbers greater than the average value, and there is a space after each number; If there is no number that satisfies the condition, an empty line is output.
If the input n is not in the valid range, output "invalid." in one line.
###Input sample 1:
```in
ten
55 23 8 11 22 89 0 -1 78 186
```
###Output sample 1:
```out
forty-seven point one zero
55 89 78 186
```
###Input sample 2:
```
0
```
###Output sample 2:
```
Invalid.
```
answer：If there is no answer, please comment