Merge pull request neetcode-gh#3094 from emanuele-em/patch-5

Update 0206-reverse-linked-list.rs

Author: a93a

rust/0206-reverse-linked-list.rs

@@ -1,18 +1,11 @@
 impl Solution {
     pub fn reverse_list(mut head: Option<Box<ListNode>>) -> Option<Box<ListNode>> {
-        let mut node = None;
-        while let Some(next) = head {
-            node =
-            Some (
-                Box::new (
-                    ListNode {
-                        next : node,
-                        val : next.val,
-                    }
-                )   
-            );
-            head = next.next;
-        }
-        node
+        let (mut prev, mut curr) = (None, head);
+        while let Some(mut node) = curr{
+            curr = node.next;
+            node.next = prev;
+            prev = Some(node);
+        } 
+        pre
     }
 }