diff --git a/src/bin/01.rs b/src/bin/01.rs
new file mode 100644
index 000000000..ac4ce93
--- /dev/null
+++ b/src/bin/01.rs
@@ -0,0 +1,40 @@
+pub fn part_one(input: &str) -> Option<u32> {
+    let count = input.matches("(").count() - input.matches(")").count();
+    Some(count.try_into().unwrap())
+}
+pub fn part_two(input: &str) -> Option<u32> {
+    let mut floor = 0;
+    for (idx, char) in input.chars().enumerate() {
+        match char {
+            '(' => floor += 1,
+            ')' => floor -= 1,
+            _ => panic!("oops"),
+        };
+
+        if floor < 0 {
+            return Some(idx as u32 + 1);
+        }
+    }
+    None
+}
+fn main() {
+    let input = &aoc::read_file("inputs", 1);
+    aoc::solve!(1, part_one, input);
+    aoc::solve!(2, part_two, input);
+}
+#[cfg(test)]
+mod tests {
+    use super::*;
+    #[test]
+    fn test_part_one() {
+        // let input = aoc::read_file("test_inputs", 1);
+        let input = "(()(()(";
+        assert_eq!(part_one(&input), Some(3));
+    }
+    #[test]
+    fn test_part_two() {
+        // let input = aoc::read_file("test_inputs", 1);
+        let input = "()())";
+        assert_eq!(part_two(&input), Some(5));
+    }
+}