From 433efb35ed49be9f2a05e7b8bf2d1cc3987b6bb3 Mon Sep 17 00:00:00 2001
From: Sebastiano Tronto <sebastiano@tronto.net>
Date: Fri, 4 Jul 2025 16:45:46 +0200
Subject: Day 18 2022

---
 2022/18/b.rs | 10 ++++++++++
 1 file changed, 10 insertions(+)
 create mode 100644 2022/18/b.rs

(limited to '2022/18/b.rs')

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);
+}
-- 
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