diff --git a/2021/4/src/main.rs b/2021/4/src/main.rs
index 335ce6e..569361a 100644
--- a/2021/4/src/main.rs
+++ b/2021/4/src/main.rs
@@ -59,14 +59,12 @@ fn main() {
                     .filter(|row|
                         row[0] == -1 && row[1] == -1 && row[2] == -1 && row[3] == -1 && row[4] == -1
                     )
-                    .collect::<Vec<_>>()
-                    .len() > 0 
+                    .count() > 0 
                 ||
                 (0..5)
                     .filter(|column|
                         board[0][*column] == -1 && board[1][*column] == -1 && board[2][*column] == -1 && board[3][*column] == -1 && board[4][*column] == -1
-                    ).collect::<Vec<_>>()
-                    .len() > 0
+                    ).count() > 0
             ).collect();
 
         if last_winning_boards.len() == 0 && winning_boards.len() == 1 {