diff --git a/src/day23.rs b/src/day23.rs
index b8a8258..394d6f9 100644
--- a/src/day23.rs
+++ b/src/day23.rs
@@ -9,12 +9,13 @@ fn parse(input: &str) -> Input {
 
 #[aoc(day23, part1)]
 fn part1(input: &Input) -> usize {
-    let mut a = 0;
+    run(input.lines().collect(), 0)
+}
+fn run(mem: Vec<&str>, a: i32) -> usize {
+    let mut a = a;
     let mut b = 0;
     let mut ip: i32 = 0;
 
-    let mem = input.lines().collect::<Vec<_>>();
-
     while let Some(line) = mem.get(ip as usize) {
         let (lhs, rhs) = line.split_once(" ").unwrap();
         match lhs {
@@ -73,7 +74,6 @@ fn part1(input: &Input) -> usize {
     }
     b
 }
-
 fn parse_offset(input: &str) -> i32 {
     input.parse().unwrap()
 }