chore: fmt + clippy + time on day 3

README.md

@@ -21,8 +21,9 @@ Solutions for [Advent of Code](https://adventofcode.com/) in [Rust](https://www.
 | :---: | :---: | :---:  |
 | [Day 1](./src/bin/01.rs) | `72.0µs` | `76.8µs` |
 | [Day 2](./src/bin/02.rs) | `215.6µs` | `371.6µs` |
+| [Day 3](./src/bin/03.rs) | `652.5µs` | `736.7µs` |
 
-**Total: 0.74ms**
+**Total: 2.13ms**
 <!--- benchmarking table --->
 
 ---

src/bin/03.rs

@@ -5,8 +5,9 @@ use regex::Regex;
 pub fn part_one(input: &str) -> Option<u32> {
     let re = Regex::new(r"mul\((\d+),(\d+)\)").unwrap();
     re.captures_iter(input)
-        .map(|c| match c.extract() {
-            (_, [a, b]) => a.parse::<u32>().unwrap() * b.parse::<u32>().unwrap()
+        .map(|c| {
+            let (_, [a, b]) = c.extract();
+            a.parse::<u32>().unwrap() * b.parse::<u32>().unwrap()
         })
         .sum::<u32>()
         .into()
@@ -21,13 +22,13 @@ pub fn part_two(input: &str) -> Option<u32> {
             (_, ["don't", _, _]) => (Some(false), 0),
             _ => panic!("invalid parsing"),
         })
-     .fold((true, 0), |(flag, acc), (op_flag, op_res)|
+        .fold((true, 0), |(flag, acc), (op_flag, op_res)| {
             match (flag, acc, op_flag, op_res) {
                 (_, acc, Some(new_flag), _) => (new_flag, acc),
                 (false, acc, None, _) => (false, acc),
                 (true, acc, None, new) => (true, acc + new),
             }
-     )
+        })
         .1
         .into()
 }
@@ -48,4 +49,3 @@ mod tests {
         assert_eq!(result, Some(48));
     }
 }
-