Miam miam regex

src/day_3_1.rs

@@ -0,0 +1,16 @@
+use regex::Regex;
+use std::fs::read_to_string;
+
+pub fn solve_day_3_1() {
+    let file_path = "/home/clement/RustroverProjects/advent_of_code/src/inputs/input_3.txt";
+    println!("In file {file_path}");
+
+    let content_string = read_to_string(file_path).expect("Something went wrong reading the file");
+
+    let mul_regex = Regex::new(r"mul\((\d+),(\d+)\)").unwrap();
+    let caps = mul_regex.captures_iter(&content_string);
+    let get_int = caps
+        .map(|x| x[1].parse::<i32>().unwrap() * x[2].parse::<i32>().unwrap())
+        .sum::<i32>();
+    println!("{get_int}");
+}