1 files changed, 26 insertions, 0 deletions

diff --git a/2022/13/b.rs b/2022/13/b.rs
new file mode 100644
index 0000000..baaad3f
--- /dev/null
+++ b/2022/13/b.rs
@@ -0,0 +1,26 @@
+use std::cmp::Ordering;
+mod common;
+use common::*;
+
+fn driver(n: i64) -> Packet {
+    Packet::List(vec![Packet::List(vec![Packet::Number(n)])])
+}
+
+fn find_driver(v: &Vec<Packet>, n: i64) -> usize {
+    v.iter()
+     .position(|p| compare(p, &driver(n)) == Ordering::Equal)
+     .unwrap() + 1
+}
+
+fn main() {
+    let mut v = vec![driver(2), driver(6)];
+    let mut line = String::new();
+    while std::io::stdin().read_line(&mut line).unwrap() > 0 {
+        if line.len() > 1 { v.push(parse(line.as_bytes())); }
+        line.clear();
+    }
+
+    v.sort_by(compare);
+
+    println!("{}", find_driver(&v, 2) * find_driver(&v, 6));
+}