diff --git a/batterup.py b/batterup.py
new file mode 100644
index 0000000..76700de
--- /dev/null
+++ b/batterup.py
@@ -0,0 +1,3 @@
+_ = input()
+at_bats = [x for x in map(int, input().split()) if x >= 0]
+print(sum(at_bats) / len(at_bats))