diff --git a/Cargo.lock b/Cargo.lock
index 1de9713..1538659 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -355,5 +355,6 @@ version = "0.1.0"
 dependencies = [
  "advent_core",
  "macros",
+ "regex",
  "utils",
 ]
diff --git a/years/2024/Cargo.toml b/years/2024/Cargo.toml
index 9c567dd..22dfdbb 100644
--- a/years/2024/Cargo.toml
+++ b/years/2024/Cargo.toml
@@ -7,4 +7,5 @@ edition = "2021"
 [dependencies]
 advent_core = { path = "../../advent_core" }
 macros = { path = "../../macros" }
+regex = "1.11.1"
 utils = { path = "../../utils" }
diff --git a/years/2024/src/day_3.rs b/years/2024/src/day_3.rs
index 8ae384b..1dfdf4f 100644
--- a/years/2024/src/day_3.rs
+++ b/years/2024/src/day_3.rs
@@ -1,17 +1,31 @@
 
 use advent_core::{Day, day_stuff, ex_for_day};
+use regex::RegexBuilder;
 
 pub struct Day3;
 
+const RE: &str = r"mul\((\d+),(\d+)\)";
+
+fn re_do(i: &str) -> u64 {
+    let re = RegexBuilder::new(RE).multi_line(true).build().unwrap();
+    re.captures_iter(i).map(|c| {
+        c.get(1).unwrap().as_str().parse::<u64>().unwrap() 
+        * 
+        c.get(2).unwrap().as_str().parse::<u64>().unwrap()
+    }).sum::<u64>()
+}
+
 impl Day for Day3 {
 
-    day_stuff!(3, "", "");
+    day_stuff!(3, "161", "48");
 
-    fn part_1(_input: Self::Input) -> Option<String> {
-        None
+    fn part_1(input: Self::Input) -> Option<String> {
+        Some(re_do(&input).to_string())
     }
 
-    fn part_2(_input: Self::Input) -> Option<String> {
-        None
+    fn part_2(input: Self::Input) -> Option<String> {
+        Some(input.split("do()").map(|v| 
+            re_do(v.split("don't()").nth(0).unwrap())
+        ).sum::<u64>().to_string())
     }
 }
diff --git a/years/2024/src/examples/day_3/1.txt b/years/2024/src/examples/day_3/1.txt
index e69de29..2e1a90a 100644
--- a/years/2024/src/examples/day_3/1.txt
+++ b/years/2024/src/examples/day_3/1.txt
@@ -0,0 +1 @@
+xmul(2,4)%&mul[3,7]!@^do_not_mul(5,5)+mul(32,64]then(mul(11,8)mul(8,5))
\ No newline at end of file
diff --git a/years/2024/src/examples/day_3/2.txt b/years/2024/src/examples/day_3/2.txt
index e69de29..b774ec9 100644
--- a/years/2024/src/examples/day_3/2.txt
+++ b/years/2024/src/examples/day_3/2.txt
@@ -0,0 +1 @@
+xmul(2,4)&mul[3,7]!^don't()_mul(5,5)+mul(32,64](mul(11,8)undo()?mul(8,5))
\ No newline at end of file