1 files changed, 2 insertions, 2 deletions
diff --git a/2024_rust/src/bin/day12.rs b/2024_rust/src/bin/day12.rs
index 4408980..d4a4cdf 100644
--- a/2024_rust/src/bin/day12.rs
+++ b/2024_rust/src/bin/day12.rs
@@ -38,7 +38,7 @@ fn region_v1(m: &Matrix, pos: matrix::Pos) -> (Price, HashSet<matrix::Pos>) {
     let mut visited: HashSet<matrix::Pos> = HashSet::new();
     let mut pending: HashSet<matrix::Pos> = [pos].into();
     let mut new_pending: HashSet<matrix::Pos>;
-    while pending.len() > 0 {
+    while !pending.is_empty() {
         new_pending = HashSet::new();
         for p in pending {
             let adj = adj_same_region(m, p);
@@ -161,7 +161,7 @@ fn region(m: &Matrix, pos: matrix::Pos, version: u8) -> (Price, HashSet<matrix::
 fn region_v2(m: &Matrix, pos: matrix::Pos) -> HashSet<matrix::Pos> {
     let mut visited: HashSet<matrix::Pos> = HashSet::new();
     let mut pending: HashSet<matrix::Pos> = [pos].into();
-    while pending.len() > 0 {
+    while !pending.is_empty() {
         let mut new_pending: HashSet<matrix::Pos> = HashSet::new();
         for pos in pending {
             // println!("Processing pos={pos:?}");