Completed day 17. Had to look at some other peoples stuff for guidance though

day_16/cheating.py

@@ -0,0 +1,12 @@
+l = [[int(i) for i in s.split()] for s in open('input.txt').read().split('\n') if s.strip()]
+
+def n(l):
+	if sum(i != 0 for i in l) == 0:
+		return 0
+	m = []
+	for i in range(len(l)-1):
+		m.append(l[i+1]-l[i])
+	return l[-1] + n(m)
+
+print([n(i) for i in l])
+print(sum(n(i[::-1]) for i in l))