Average of Integers #1

Write a program that reads integers from the standard input and computes their average.

Input Specification

The first line of the input contains a positive integer n, which is followed by n integers (one per line).

Output Specification

The program should write a single line to the standard output containing the average of the n numbers with a precision of two decimal places.

Sample Input

1. 5
2. -2
3. -1
4. 0
5. 1
6. 2

Output for Sample Input

1. 0.00