feat(content): function signatures + test cases

backend/data/questions/beautiful-array.yaml

@@ -9,6 +9,28 @@ categories:
 patterns:
   - dynamic-programming
 
+function_signature: "def beautiful_array(n: int) -> list[int]:"
+
+test_cases:
+  visible:
+    - input: { n: 4 }
+      expected: [2, 1, 4, 3]
+    - input: { n: 5 }
+      expected: [3, 1, 2, 5, 4]
+  hidden:
+    - input: { n: 1 }
+      expected: [1]
+    - input: { n: 2 }
+      expected: [1, 2]
+    - input: { n: 3 }
+      expected: [1, 3, 2]
+    - input: { n: 6 }
+      expected: [3, 1, 2, 5, 6, 4]
+    - input: { n: 10 }
+      expected: [5, 3, 1, 7, 9, 6, 2, 4, 10, 8]
+    - input: { n: 8 }
+      expected: [5, 3, 1, 7, 6, 2, 4, 8]
+
 description: |
   An array `nums` of length `n` is **beautiful** if: