diff --git a/gg.py b/gg.py
new file mode 100644
index 0000000..f3eb13a
--- /dev/null
+++ b/gg.py
@@ -0,0 +1,11 @@
+
+n=int(input())
+
+def f(n):
+    if n==1:
+        return 1
+
+    return n * f(n-1)
+
+print(f(n))
+