1 files changed, 11 insertions, 0 deletions
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()