feat(content): more test cases

backend/data/questions/basic-calculator-ii.yaml

@@ -10,6 +10,26 @@ categories:
 patterns:
   - monotonic-stack
 
+function_signature: "def calculate(s: str) -> int:"
+
+test_cases:
+  visible:
+    - input: { s: "3+2*2" }
+      expected: 7
+    - input: { s: " 3/2 " }
+      expected: 1
+    - input: { s: " 3+5 / 2 " }
+      expected: 5
+  hidden:
+    - input: { s: "42" }
+      expected: 42
+    - input: { s: "1+1+1" }
+      expected: 3
+    - input: { s: "2*3*4" }
+      expected: 24
+    - input: { s: "14-3/2" }
+      expected: 13
+
 description: |
   Given a string `s` which represents an expression, *evaluate this expression and return its value*.