Average Salary#568

Average Salary

0.5 seconds
64 megabytes
Very easy

A company employs at least two people: the director and the chief accountant. The total number of employees does not exceed . The salary of each employee is known. Using this information, determine the average salary in the company.

Input

The salaries of the employees are given in the national currency (the salaries may be provided over several lines).

Output

Print the average salary in the company in the national currency, rounded to decimal places.

Examples

Example 1

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