diff --git a/gcvwr.py b/gcvwr.py
new file mode 100644
index 0000000..4cff673
--- /dev/null
+++ b/gcvwr.py
@@ -0,0 +1,3 @@
+g, t, n = map(int, input().split())
+w = map(int, input().split())
+print(int((g - t) * 0.9 - sum(w)))