commit 2ec2ac57d23f7a5e4c79c59a41b7b6f38dc1d98d
Author: nwerc-082 <nwerc-082@nwerc-082.bath.ac.uk>
Date:   Sat Nov 19 10:36:46 2016 +0000

    ...

diff --git a/A.py b/A.py
new file mode 100644
index 0000000..33eee46
--- /dev/null
+++ b/A.py
@@ -0,0 +1,3 @@
+import sys
+N = int(sys.stdin.readline())
+print(N**0.5*4)