commit f3ae7216c3204022df7f93a55d8953a2522a9711
Author: Reimar <mail@reim.ar>
Date:   Mon Dec 15 14:27:48 2025 +0100

    Solve day 1 part 1

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..6ef8157
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,4 @@
+input.txt
+.idea/
+day_*
+!*.cpp
diff --git a/day_1.cpp b/day_1.cpp
new file mode 100644
index 0000000..4a98f29
--- /dev/null
+++ b/day_1.cpp
@@ -0,0 +1,31 @@
+#include <fstream>
+#include <iostream>
+
+int main()
+{
+	int dial = 50;
+	int password = 0;
+
+	std::ifstream file("input.txt");
+	std::string line;
+
+	while (getline(file, line)) {
+		int delta = std::stoi(line.substr(1));
+
+		switch (line[0]) {
+			case 'L':
+				dial -= delta;
+				while (dial < 0) dial += 100;
+				break;
+			case 'R':
+				dial = (dial + delta) % 100;
+				break;
+		}
+
+		if (dial == 0) password++;
+	}
+
+	std::cout << password << std::endl;
+
+	return 0;
+}