chore: prep for day 4

rust/2021/src/day_04.rs

@@ -0,0 +1,30 @@
+fn solve_part1(input: &str) -> i32 {
+    todo!();
+}
+
+fn solve_part2(input: &str) -> i32 {
+    todo!();
+}
+
+pub fn run(input: String) {
+    println!("--- Part 1 ---");
+    println!("Answer: {}", solve_part1(&input));
+    println!();
+    println!("--- Part 2 ---");
+    println!("Answer: {}", solve_part2(&input))
+}
+
+#[cfg(test)]
+mod tests {
+    const EXAMPLE_INPUT: &str = todo!();
+
+    #[test]
+    fn part1() {
+        todo!();
+    }
+
+    #[test]
+    fn part2() {
+        todo!();
+    }
+}

rust/2021/src/lib.rs

@@ -1,9 +1,10 @@
 mod day_01;
 mod day_02;
 mod day_03;
+mod day_04;
 
-pub const INPUT_PATH: &str = "./input/2021/day3.txt";
+pub const INPUT_PATH: &str = "./input/2021/day4.txt";
 
 pub fn run(input: String) {
-    day_03::run(input);
+    day_04::run(input);
 }