feat: day3 part1 complete

1 files changed, 47 insertions, 0 deletions

diff --git a/day3/part1/main.ha b/day3/part1/main.ha
new file mode 100644
index 0000000..f7384ce
--- /dev/null
+++ b/day3/part1/main.ha
@@ -0,0 +1,47 @@
+use fmt;
+use io;
+use os;
+use strconv::{stou8};
+use strings::{fromutf8_unsafe, split, sub};
+
+fn joltage(bank: str) u8 = {
+	let first: u8 = 1;
+	let second: u8 = 1;
+
+	let first_index: size = 0;
+
+	for (let i: size = 0; i < len(bank); i += 1) {
+		let val = stou8(sub(bank, i, i + 1))!;
+
+		if (val > first && i < len(bank) - 1) {
+			first = val;
+			first_index = i;
+		};
+	};
+
+	for (let i: size = first_index + 1; i < len(bank); i += 1) {
+		let val = stou8(sub(bank, i, i + 1))!;
+
+		if (val > second)
+			second = val;
+	};
+
+	return first * 10 + second;
+};
+
+export fn main() void = {
+	let handle = os::open("input.txt")!;
+	defer io::close(handle)!;
+
+	let buf = io::drain(handle)!;
+	defer free(buf);
+
+	let lines = split(fromutf8_unsafe(buf), "\n")!;
+	let output = 0;
+
+	for (let line .. lines)
+		if (line != "")
+			output += joltage(line): int;
+
+	fmt::printfln("Answer: {}", output)!;
+};