add until day05-1

day01/Cargo.lock

@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
+[[package]]
+name = "day01"
+version = "0.1.0"

day01/Cargo.toml

@@ -0,0 +1,6 @@
+[package]
+name = "day01"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]

day01/example.txt

@@ -0,0 +1 @@
+()())

day01/src/main.rs

@@ -0,0 +1,32 @@
+#[cfg(debug_assertions)]
+const FILENAME: &str = "example.txt";
+#[cfg(not(debug_assertions))]
+const FILENAME: &str = "input.txt";
+
+fn main() {
+    let data = std::io::read_to_string(std::fs::File::open(FILENAME).unwrap()).unwrap();
+    let s = data.trim();
+
+    part_1(s);
+    part_2(s);
+}
+
+fn part_1(data: &str) {
+    let result: i64 = data.chars().map(|c| if c == '(' { 1 } else { -1 }).sum();
+    println!("{result}");
+}
+
+fn part_2(data: &str) {
+    let mut current_floor: i64 = 0;
+    for (i, c) in data.chars().enumerate() {
+        if c == '(' {
+            current_floor += 1;
+        } else {
+            current_floor -= 1;
+        }
+        if current_floor == -1 {
+            println!("{}", i + 1);
+            break;
+        }
+    }
+}