Average of Integers #2

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

Input Specification

Each of the input lines contains an integer. The input is terminated by end-of-file (EOF).

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

Output for Sample Input

1. 0.00