diff --git a/progress.yaml b/progress.yaml
index 79f8d02..c55a64b 100644
--- a/progress.yaml
+++ b/progress.yaml
@@ -1,4 +1,6 @@
 1:
   stars: 2
 2:
-  stars: 2
\ No newline at end of file
+  stars: 2
+3:
+  stars: 1
\ No newline at end of file
diff --git a/res/examples/day3.txt b/res/examples/day3.txt
new file mode 100644
index 0000000..2e1a90a
--- /dev/null
+++ b/res/examples/day3.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/src/day3/puzzle1.typ b/src/day3/puzzle1.typ
new file mode 100644
index 0000000..b46419a
--- /dev/null
+++ b/src/day3/puzzle1.typ
@@ -0,0 +1,16 @@
+#import "/src/utils.typ": *
+
+#let solve(input) = {
+  let matches = input.matches(regex("mul\((\d{1,3}),(\d{1,3})\)"))
+  let total = matches.map(m => {
+    m.captures.map(int)
+              .product()
+  }).sum()
+  return total
+}
+
+#show-puzzle(
+  3, 1,
+  solve,
+  example: 161
+)
\ No newline at end of file
diff --git a/src/day3/puzzle2.typ b/src/day3/puzzle2.typ
new file mode 100644
index 0000000..e69de29
diff --git a/src/main.pdf b/src/main.pdf
index 48d48dd..964c603 100644
Binary files a/src/main.pdf and b/src/main.pdf differ