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

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

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).

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