2022 day13/rust: clean up

2022/day13/rust/src/main.rs

@@ -50,29 +50,29 @@ fn main() {
         })
         .collect();
 
-    let sum: usize = pairs
+    let num_sorted: usize = pairs
         .iter()
         .enumerate()
         .filter_map(|(i, (left, right))| (left <= right).then_some(i + 1))
         .sum();
 
-    println!("{}", sum);
+    println!("{}", num_sorted);
+
+    let dividers = [2, 6]
+        .into_iter()
+        .map(|i| Data::List(vec![Data::List(vec![Data::Number(i)])]));
 
     let mut sorted: Vec<_> = pairs
         .into_iter()
         .flat_map(|(left, right)| [left, right])
         .collect();
-    let divider = |divider| Data::List(vec![Data::List(vec![Data::Number(divider)])]);
-    sorted.push(divider(2));
-    sorted.push(divider(6));
+    sorted.extend(dividers.clone());
     sorted.sort();
 
-    let index = |divider| {
-        sorted
-            .binary_search(&Data::List(vec![Data::List(vec![Data::Number(divider)])]))
-            .unwrap()
-            + 1
-    };
-
-    println!("{}", index(2) * index(6));
+    println!(
+        "{}",
+        dividers
+            .map(|div| sorted.binary_search(&div).unwrap() + 1)
+            .product::<usize>()
+    );
 }