Given an array $A$ with $n$ integer elements, calculate the average of the elements in the array.
### Input
- The first line contains an integer $n$.
- The second line contains $n$ integers $A_i$.
### Output
- Print a real number representing the rounded average of the elements in the array to three decimal places.
### Constraints
- $1 \le n \le 1000$
- $1 \le A_i \le 1000$
### Sample
Input:
```
5
1 1 2 1 1
```
Output:
```
1.200
```
