Problems
The arithmetic mean of positive
The arithmetic mean of positive
The sequence of real numbers is given. Find the arithmetic mean of positive numbers.
Input data
First line contains amount n (0 < n ≤ 100) of real numbers. Next line contains n real numbers, each of them is not greater than 100 by absolute value.
Output data
Print the arithmetic mean of positive numbers with 2 digits after decimal point. If the positive numbers do not appear in the sequence, print "Not Found" (without quotes).
Examples
Input example #1
3 5.2 -2 4
Output example #1
4.60
Input example #2
3 -5.2 -2 -4
Output example #2
Not Found