feat(content): function signatures + test cases

backend/data/questions/a-number-after-a-double-reversal.yaml

@@ -8,6 +8,28 @@ categories:
 patterns:
   - greedy
 
+function_signature: "def is_same_after_reversals(num: int) -> bool:"
+
+test_cases:
+  visible:
+    - input: { num: 526 }
+      expected: true
+    - input: { num: 1800 }
+      expected: false
+    - input: { num: 0 }
+      expected: true
+  hidden:
+    - input: { num: 1 }
+      expected: true
+    - input: { num: 10 }
+      expected: false
+    - input: { num: 100 }
+      expected: false
+    - input: { num: 123 }
+      expected: true
+    - input: { num: 12300 }
+      expected: false
+
 description: |
   **Reversing** an integer means to reverse all its digits.