feat: day1 part1 complete

1 files changed, 43 insertions, 0 deletions

diff --git a/day1/part1/main.ha b/day1/part1/main.ha
new file mode 100644
index 0000000..4f9b2b2
--- /dev/null
+++ b/day1/part1/main.ha
@@ -0,0 +1,43 @@
+use os;
+use io;
+use fmt;
+use strings;
+use strconv;
+
+export fn main() void = {
+	const handle = os::open("input.txt")!;
+	defer io::close(handle)!;
+
+	let buf = io::drain(handle) as []u8;
+	defer free(buf);
+
+	let input = strings::fromutf8_unsafe(buf[..]);
+	let lines = strings::split(input, "\n")!;
+
+	let dial: i16 = 50;
+	let zeroes_seen: u16 = 0;
+
+	for (let line .. lines[..]) {
+		if (strings::hasprefix(line, "L")) {
+			dial -= strconv::stoi16(strings::ltrim(line, 'L'))!;
+		} else if (strings::hasprefix(line, "R")) {
+			dial += strconv::stoi16(strings::ltrim(line, 'R'))!;
+		} else {
+			continue;
+		};
+
+		for (dial < 0 || dial > 99) {
+			if (dial < 0) {
+				dial += 100;
+			} else if (dial > 99) {
+				dial -= 100;
+			};
+		};
+
+		if (dial == 0) {
+			zeroes_seen += 1;
+		};
+	};
+
+	fmt::printfln("Password: {}", zeroes_seen)!;
+};