From e2ecfaedadb4ae290e198574ead757c7f8a9b2db Mon Sep 17 00:00:00 2001
From: FrederikBaerentsen <frederik+gitea@baerentsen.net>
Date: Sat, 9 Dec 2023 19:30:11 +0100
Subject: [PATCH] Working on 2023-12-09 p2

---
 2023/day9/part2.py | 50 ++++++++++++++++++++++++++++++++++++++++++++++
 2023/day9/test     |  3 +++
 2 files changed, 53 insertions(+)
 create mode 100644 2023/day9/part2.py
 create mode 100644 2023/day9/test

diff --git a/2023/day9/part2.py b/2023/day9/part2.py
new file mode 100644
index 0000000..5b679d1
--- /dev/null
+++ b/2023/day9/part2.py
@@ -0,0 +1,50 @@
+import sys
+from pprint import pprint
+from functools import reduce
+
+maps = []
+
+with open(sys.argv[1]) as file:
+    for line in file:
+        maps.append([int(x) for x in line.rstrip().split(' ')])
+
+t = []
+
+def calc(line):
+    global t
+    t.append(line)
+    print(line)
+    diff = []
+    for i in range(0,len(line)-1):
+        diff.append(line[i+1]-line[i])
+    if not all(v == 0 for v in diff):
+        last.append(diff[-1])
+        calc(diff)
+    else:
+        print(diff)
+    return 0
+
+prev = 0
+
+result = [] 
+for mdx,m in enumerate(maps):
+    t = []
+    left = []
+    last = []
+    last.append(m[-1])
+    last.append(calc(m))
+    result.append(reduce(lambda x, y: x+y, last))
+    print(t)
+pprint(last)
+print(sum(result))
+pprint(t)
+
+tx = [] 
+
+tmp = 0
+for i in range(len(t)-1,-1,-1):
+    tx.append(t[i][0])
+    tmp = t[i][0] - tmp
+
+print(tx)
+print(tmp)
diff --git a/2023/day9/test b/2023/day9/test
new file mode 100644
index 0000000..539a763
--- /dev/null
+++ b/2023/day9/test
@@ -0,0 +1,3 @@
+0 3 6 9 12 15
+1 3 6 10 15 21
+10 13 16 21 30 45