PROGRAMMING:Shopping (1)
The user first enters a non negative integer n, which means that he has purchased n items. Then, the user can input the price of N goods, and output the average price of goods purchased by the user.
###Input format:
The first line is a non negative integer n (no more than 10), representing the number of goods.
The second line is n real numbers separated by spaces (each number does not exceed 100000), representing the price of each commodity.
###Output format:
Output a real number, the average price of goods, accurate to 2 decimal places.
###Input example:
```in
five
180 89.3 20 1000 12
```
###Output example:
```out
two hundred and sixty point two six
```
answer：If there is no answer, please comment
This is a fixed number of cycles, so just read in N, and then in N cycles, read a number and accumulate the price sum. At the end of the cycle, the average price of the goods is calculated.
###Input format:
The first line is a non negative integer n (no more than 10), representing the number of goods.
The second line is n real numbers separated by spaces (each number does not exceed 100000), representing the price of each commodity.
###Output format:
Output a real number, the average price of goods, accurate to 2 decimal places.
###Input example:
```in
five
180 89.3 20 1000 12
```
###Output example:
```out
two hundred and sixty point two six
```
answer：If there is no answer, please comment
This is a fixed number of cycles, so just read in N, and then in N cycles, read a number and accumulate the price sum. At the end of the cycle, the average price of the goods is calculated.