From 450342e67a596f4a2825319999f10743c5770796 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Gustav=20S=C3=B6rn=C3=A4s?= <gusso230@student.liu.se>
Date: Sat, 21 Dec 2019 07:50:22 +0100
Subject: Day 21 part 1

---
 19/py/d21.py | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to '19')

diff --git a/19/py/d21.py b/19/py/d21.py
index 2e39563..3b2e123 100644
--- a/19/py/d21.py
+++ b/19/py/d21.py
@@ -1,3 +1,14 @@
+# program and idea for part 1:
+# jump if any tile of the first three aren't ground and the fourth is ground
+# J = (not A or not B or not C) and D
+# (dm) <=> J = not (A and B and C) and D
+# or A T
+# and B T
+# and C T
+# not T J
+# and D J
+# walk
+
 import intcode
 
 f = open("../input/21", "r").readlines()
-- 
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