day5 part2

src/day5.rs

@@ -78,7 +78,9 @@ pub fn solve_d5_p2(input: &[u8]) -> SeatId {
                 sum: sum + seatid.0 as u32,
             },
         );
-    let num_seats = max as u32 - min as u32 + 1;
-    let expected_sum = (max + min) as u32 * num_seats / 2;
+    let max = max as u32;
+    let min = min as u32;
+    let num_seats = max - min + 1;
+    let expected_sum = (max + min) * num_seats / 2;
     SeatId((expected_sum - sum) as u16)
 }