Expected Sum Calculation

You are given an integer \(n\) and a sequence \(S\) of \(n\) floating-point numbers. Your task is to compute the expected sum defined by the formula:

\(E = \frac{\sum_{i=1}^{n}{S_i}}{n}\)

Read the input from stdin and output the result to stdout with exactly six decimal places.

inputFormat

The first line contains an integer \(n\) representing the number of elements in the sequence. The second line contains \(n\) space-separated floating-point numbers representing the sequence \(S\).

outputFormat

Output the expected sum computed as \(\frac{\sum_{i=1}^{n}{S_i}}{n}\) with exactly six decimal places.

1
5.0

5.000000