1 files changed, 10 insertions, 0 deletions

diff --git a/2022/18/b.rs b/2022/18/b.rs
new file mode 100644
index 0000000..a82c213
--- /dev/null
+++ b/2022/18/b.rs
@@ -0,0 +1,10 @@
+mod common;
+use common::*;
+
+fn main() {
+    let mut map = Map::from_stdin();
+    let total_free = map.total_free_area();
+    map.fill_exterior();
+    let interior_free = map.total_free_area() - 6*MAX_LEN*MAX_LEN;
+    println!("{}", total_free - interior_free);
+}