updated instructions

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](${check}). Help me find the correct input to this function!
+I've spent too long in the high level, let's take the level [down a notch](${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{}`.

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!"