From 76d1e52697a0cdd0a1264450e3d463e18fab0ef3 Mon Sep 17 00:00:00 2001
From: Michael Zhang <failed.down@gmail.com>
Date: Sat, 11 Feb 2017 17:25:24 -0600
Subject: [PATCH] updated instructions

---
 down-a-notch/description.md |  3 ++-
 down-a-notch/grader.py      | 13 +++++++++++++
 2 files changed, 15 insertions(+), 1 deletion(-)
 create mode 100644 down-a-notch/grader.py

diff --git a/down-a-notch/description.md b/down-a-notch/description.md
index 77fba5f..1a777b6 100644
--- a/down-a-notch/description.md
+++ b/down-a-notch/description.md
@@ -1 +1,2 @@
-I've spent too long in the high level, let's take the level [down a notch](${check}). Help me find the correct input to this function!
\ No newline at end of file
+I've spent too long in the high level, let's take the level [down a notch](${check}). Help me find the correct input to this function!  
+Your answer should be in the format `a:b` where `a` and `b` are integers. Do **not** wrap it with `easyctf{}`.
\ No newline at end of file
diff --git a/down-a-notch/grader.py b/down-a-notch/grader.py
new file mode 100644
index 0000000..1501ec0
--- /dev/null
+++ b/down-a-notch/grader.py
@@ -0,0 +1,13 @@
+def grade(autogen, key):
+    try:
+        a, b = map(int, key.split(":"))
+        c = a ^ b
+        d = 98 + c
+        e = ~d + b
+        f = e ^ a
+        g = a + b * c / d ^ e + f
+        if g != -814:
+            raise Exception("lol")
+        return True, "Nice!"
+    except:
+        return False, "Nope. Keep trying!"