diff --git a/Cargo.lock b/Cargo.lock
index 9504be6..e8bbce6 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -23,6 +23,7 @@ version = "0.11.0"
 dependencies = [
  "chrono",
  "dhat",
+ "itertools",
  "pico-args",
  "tinyjson",
 ]
@@ -126,6 +127,12 @@ dependencies = [
  "thousands",
 ]
 
+[[package]]
+name = "either"
+version = "1.13.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "60b1af1c220855b6ceac025d3f6ecdd2b7c4894bfe9cd9bda4fbb4bc7c0d4cf0"
+
 [[package]]
 name = "gimli"
 version = "0.28.1"
@@ -155,6 +162,15 @@ dependencies = [
  "cc",
 ]
 
+[[package]]
+name = "itertools"
+version = "0.13.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "413ee7dfc52ee1a4949ceeb7dbc8a33f2d6c088194d9f922fb8318faf1f01186"
+dependencies = [
+ "either",
+]
+
 [[package]]
 name = "itoa"
 version = "1.0.9"
diff --git a/Cargo.toml b/Cargo.toml
index 038a1a3..a80ffa7 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -24,6 +24,7 @@ test_lib = []
 # Template dependencies
 chrono = { version = "0.4.38", optional = true }
 dhat = { version = "0.3.3", optional = true }
+itertools = "0.13.0"
 pico-args = "0.5.0"
 tinyjson = "2.5.1"
 
diff --git a/data/examples/01.txt b/data/examples/01.txt
new file mode 100644
index 0000000..b8af9ad
--- /dev/null
+++ b/data/examples/01.txt
@@ -0,0 +1,6 @@
+3   4
+4   3
+2   5
+1   3
+3   9
+3   3
diff --git a/src/bin/01.rs b/src/bin/01.rs
new file mode 100644
index 0000000..2aadd43
--- /dev/null
+++ b/src/bin/01.rs
@@ -0,0 +1,51 @@
+use itertools::Itertools;
+
+advent_of_code::solution!(1);
+
+fn get_lists(input: &str) -> (Vec<u32>, Vec<u32>) {
+    let numbers: Vec<u32> = input
+        .lines()
+        .flat_map(|line| line.split_whitespace().map(|x| x.parse::<u32>().unwrap()))
+        .collect();
+    let left = numbers.iter().step_by(2).map(|x| *x).collect();
+    let right = numbers.iter().skip(1).map(|x| *x).step_by(2).collect();
+
+    (left, right)
+}
+
+pub fn part_one(input: &str) -> Option<u32> {
+    let (left, right) = get_lists(input);
+    Some(
+        left.iter()
+            .sorted()
+            .zip(right.iter().sorted())
+            .map(|(l, r)| l.abs_diff(*r))
+            .sum(),
+    )
+}
+
+pub fn part_two(input: &str) -> Option<u32> {
+    let (left, right) = get_lists(input);
+    Some(
+        left.iter()
+            .map(|l| l * right.iter().filter(|r| *r == l).count() as u32)
+            .sum(),
+    )
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_part_one() {
+        let result = part_one(&advent_of_code::template::read_file("examples", DAY));
+        assert_eq!(result, Some(11));
+    }
+
+    #[test]
+    fn test_part_two() {
+        let result = part_two(&advent_of_code::template::read_file("examples", DAY));
+        assert_eq!(result, Some(31));
+    }
+}