From d66cd1179d9f448e5496af4750c810a7fc9c6eb7 Mon Sep 17 00:00:00 2001
From: Kharec <sandro@cazzaniga.fr>
Date: Mon, 1 Dec 2025 07:31:15 +0100
Subject: [PATCH] feat: solve P1 using modulo to keep it between boundaries

---
 internal/2025/DayOne/code.go | 43 ++++++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)
 create mode 100644 internal/2025/DayOne/code.go

diff --git a/internal/2025/DayOne/code.go b/internal/2025/DayOne/code.go
new file mode 100644
index 0000000..cb41e7c
--- /dev/null
+++ b/internal/2025/DayOne/code.go
@@ -0,0 +1,43 @@
+package dayone
+
+import (
+	"advent-of-code/internal/registry"
+	"os"
+	"strconv"
+	"strings"
+)
+
+func init() {
+	registry.Register("2025D1", ParseInput, PartOne, PartTwo)
+}
+
+func ParseInput(filepath string) []string {
+	content, _ := os.ReadFile(filepath)
+	return strings.Split(string(content), "\n")
+}
+
+func PartOne(data []string) int {
+	position := 50
+	count := 0
+
+	for _, rotation := range data {
+		direction := rotation[0]
+		distance, _ := strconv.Atoi(rotation[1:])
+
+		if direction == 'L' {
+			position = (position - distance + 100) % 100
+		} else {
+			position = (position + distance) % 100
+		}
+
+		if position == 0 {
+			count++
+		}
+	}
+
+	return count
+}
+
+func PartTwo(data []string) int {
+	return 0
+}