commit d680398c969b95cd8cf02855a16800f4ca5732b0
Author: nwerc-082 <nwerc-082@nwerc-082.bath.ac.uk>
Date:   Sun Nov 20 10:26:26 2016 +0000

    ...

diff --git a/C.py b/C.py
new file mode 100644
index 0000000..207bcc3
--- /dev/null
+++ b/C.py
@@ -0,0 +1,7 @@
+from __future__ import print_function
+import sys
+x, y  = map(float, sys.stdin.readline().split())
+n     = float(sys.stdin.readline())
+for l,u,f in ( map(float, line.split()) for line in sys.stdin ):
+  y -= (u-l)*(1-f)
+print(x / y)