feat(content): more test cases

backend/data/questions/reorder-list.yaml

@@ -10,6 +10,26 @@ patterns:
   - fast-slow-pointers
   - linkedlist-reversal
 
+function_signature: "def reorder_list(head: ListNode) -> None:"
+
+test_cases:
+  visible:
+    - input: { head: [1, 2, 3, 4] }
+      expected: [1, 4, 2, 3]
+    - input: { head: [1, 2, 3, 4, 5] }
+      expected: [1, 5, 2, 4, 3]
+  hidden:
+    - input: { head: [1] }
+      expected: [1]
+    - input: { head: [1, 2] }
+      expected: [1, 2]
+    - input: { head: [1, 2, 3] }
+      expected: [1, 3, 2]
+    - input: { head: [1, 2, 3, 4, 5, 6] }
+      expected: [1, 6, 2, 5, 3, 4]
+    - input: { head: [1, 2, 3, 4, 5, 6, 7] }
+      expected: [1, 7, 2, 6, 3, 5, 4]
+
 description: |
   You are given the head of a singly linked-list. The list can be represented as: