Total Length of Valid Fish

John's fishing log records the length of each fish he caught, but only entries with strictly positive values are considered valid. Given an integer n representing the number of records, and a list of n integers denoting the fish lengths, your task is to compute the total length of valid fish.

A fish is considered valid if its length is a positive integer. For example, if the fish lengths are [10, -2, 30, 0, 15], the valid fish are 10, 30, and 15, and their total length is 55.

Input and Output: Read input from stdin and write the output to stdout.

Mathematical Note: The sum can be expressed in LaTeX as \( \sum_{i=1}^{n} f_i \) where \( f_i > 0 \) for valid fish.

inputFormat

The input consists of two lines:

1. The first line contains a single integer ( n ) (the number of fish records).
2. The second line contains ( n ) space-separated integers representing the fish lengths.

outputFormat

Output a single integer representing the total length of valid fish (only those fish with strictly positive lengths).## sample

5
10 20 30 5 15

80