diff --git a/day8/src/main.rs b/day8/src/main.rs
index 8346143..bd4b56e 100644
--- a/day8/src/main.rs
+++ b/day8/src/main.rs
@@ -28,11 +28,10 @@ fn main() {
     let mut lines_iter = lines_str.lines();
     let directions = lines_iter.next().unwrap();
     lines_iter.next();
-    let mut nodes: HashMap<&str, (&str, &str)> = HashMap::new();
-    for line in lines_iter {
+    let nodes = lines_iter.map(|line| {
         let mut ids = line.split([' ', '(', ')', '=', ',']).filter(|&str| !str.is_empty());
-        nodes.insert(ids.next().unwrap(), (ids.next().unwrap(), ids.next().unwrap()));
-    }
+        (ids.next().unwrap(), (ids.next().unwrap(), ids.next().unwrap()))
+    }).collect::<HashMap<_, _>>();
     let counter1 = get_steps_to(directions, &nodes, "AAA", |str| str == "ZZZ");
     let counter2 = nodes.iter()
         .filter_map(|(&id, _)|