From 5deb351504bbdbbbd73d5ce4c72a577a212603fc Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Anders=20Engl=C3=B6f=20Ytterstr=C3=B6m?= <yttan@fastmail.se>
Date: Mon, 2 Dec 2024 06:46:41 +0100
Subject: [PATCH] Solve 2024:2 p1-2 "Red-Nosed Reports"

DDOS of adventofcode.com, did not get to open the
puzzle until 06:05 (five minutes local time).

Screwed up the zip() and lost valuable minutes by
trying to replace it with itertools, only to find
I have made a typo (did AB CD EF instead of AB BC
CD).

I also lost valuable minutes by tring to solve p1
with one nested loop. Stupid.

For part 2, I created the issafe() helper to be
able to remove items from reports and test, one
at the time.
---
 2024-python/output/day_02.py | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)
 create mode 100644 2024-python/output/day_02.py

diff --git a/2024-python/output/day_02.py b/2024-python/output/day_02.py
new file mode 100644
index 0000000..21a687c
--- /dev/null
+++ b/2024-python/output/day_02.py
@@ -0,0 +1,34 @@
+from output import ints
+
+
+def solve(data):
+    reports = [ints(line) for line in data.splitlines()]
+    p1 = 0
+    p2 = 0
+
+    for report in reports:
+        if issafe(report):
+            p1 += 1
+
+        for i in range(len(report)):
+            if issafe(report[:i] + report[i + 1 :]):
+                p2 += 1
+                break
+
+    return p1, p2
+
+
+def issafe(report):
+    diffs = [a - b for a, b in zip(report, report[1:])]
+
+    return all(-3 <= d <= -1 for d in diffs) or all(1 <= d <= 3 for d in diffs)
+
+
+if __name__ == "__main__":
+    with open("./input/02.txt", "r") as f:
+        inp = f.read().strip()
+
+    p1, p2 = solve(inp)
+
+    print(p1)
+    print(p2)