From fc6ef766a57844d66b28515991d49d49d2e77b9f Mon Sep 17 00:00:00 2001
From: John Costa <johncosta027@gmail.com>
Date: Mon, 1 Dec 2025 19:28:15 +0000
Subject: [PATCH] 2025: Day 1

---
 AdventOfCode2025/day1/index.ts | 38 ++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)
 create mode 100644 AdventOfCode2025/day1/index.ts

diff --git a/AdventOfCode2025/day1/index.ts b/AdventOfCode2025/day1/index.ts
new file mode 100644
index 0000000..0269aa0
--- /dev/null
+++ b/AdventOfCode2025/day1/index.ts
@@ -0,0 +1,38 @@
+const file = Bun.file("./input.txt");
+const content = await file.text();
+
+const turns = content
+	.trim()
+	.split("\n")
+	.map((l) => Number(l[0] === "L" ? -1 : 1) * Number(l.slice(1)));
+
+let part1 = 0;
+let part2 = 0;
+let position = 50;
+
+for (const turn of turns) {
+	const effectiveTurn = turn % 100;
+	const boundToAdd = position === 0 ? 0 : 1;
+
+	position += effectiveTurn;
+
+	if (position > 99) {
+		position = position - 100;
+		part2 += boundToAdd;
+	} else if (position < 0) {
+		position = 100 + position;
+		part2 += boundToAdd;
+	} else if (position === 0) {
+		part2 += boundToAdd;
+	}
+
+	const fullTurns = Math.floor(Math.abs(turn) / 100);
+	part2 += fullTurns;
+
+	if (position === 0) {
+		part1++;
+	}
+}
+
+console.log("Part 1: ", part1);
+console.log("Part 2: ", part2);