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Average Salary

Average Salary

Time limit 0.5 seconds
Memory limit 64 MiB

A company employs a number of employees, but not less than two: the director and the chief accountant. We also know that the number of employees does not exceed 1000. The task is to determine the average salary in the enterprise by knowing salary of every employee.

Input data

Wages of employees (not necessarily in one line) in national currency.

Output data

Average salary in the enterprise in UAH to within 2 digits after the decimal point.


Input example #1
100.50 300.50
Output example #1
Source Stage III All-Ukrainian Olympiad 2009-2010 Zhitomir