diff --git a/src/bin/day23.rs b/src/bin/day23.rs
index bbe8c0e..98f3384 100644
--- a/src/bin/day23.rs
+++ b/src/bin/day23.rs
@@ -98,12 +98,9 @@ fn propose_moves(i: usize, elves: &Input) -> BTreeMap<Position, Position> {
 }
 
 fn execute_moves(elves: &mut Input, moves: &BTreeMap<Position, Position>) {
-    for previous_position in moves.values() {
-        elves.remove(previous_position);
-    }
-
-    for new_position in moves.keys() {
-        elves.insert(*new_position);
+    for (to, from) in moves.iter() {
+        elves.remove(from);
+        elves.insert(*to);
     }
 }