From 416dbb4e4b5e956648f37f18b565446ec70a641d Mon Sep 17 00:00:00 2001
From: Yao Zhang <psyyz10@nottingham.ac.uk>
Date: Thu, 7 Sep 2017 09:52:58 +0800
Subject: [PATCH] Add Greater and Less operations (#1525)

* finish greater and less

* fix scala style