feat(content): hidden test cases

backend/data/questions/check-if-a-parentheses-string-can-be-valid.yaml

@@ -9,6 +9,30 @@ categories:
 patterns:
   - greedy
 
+function_signature: "def can_be_valid(s: str, locked: str) -> bool:"
+
+test_cases:
+  visible:
+    - input: { s: "))()))", locked: "010100" }
+      expected: true
+    - input: { s: "()()", locked: "0000" }
+      expected: true
+    - input: { s: ")", locked: "0" }
+      expected: false
+  hidden:
+    - input: { s: "()", locked: "11" }
+      expected: true
+    - input: { s: ")(", locked: "00" }
+      expected: true
+    - input: { s: "((", locked: "11" }
+      expected: false
+    - input: { s: "))", locked: "11" }
+      expected: false
+    - input: { s: "((()", locked: "0000" }
+      expected: true
+    - input: { s: "((()))", locked: "111111" }
+      expected: true
+
 description: |
   A parentheses string is a **non-empty** string consisting only of `'('` and `')'`. It is valid if **any** of the following conditions is **true**: