day17: don't revisit the start position

2023-12-17 20:55:42 -08:00
parent 3ee26cefe5
commit e65c17c8e6
1 changed files with 1 additions and 0 deletions
--- a/17/src/main.rs
+++ b/17/src/main.rs
@@ -311,6 +311,7 @@ impl<'a> WalkCost2<'a> {
                            weight: cur_move.weight + self.map.map[new_pos.1][new_pos.0],
                        })
                    })
+                    .filter(|m| m.new_pos != self.start)
                    .filter(|m| *m.dir != cur_move.dir.opposite())
                    .filter(|m| {
                        if m.dir == cur_move.dir {