feat(content): more test cases

backend/data/questions/decode-ways.yaml

@@ -9,6 +9,26 @@ categories:
 patterns:
   - dynamic-programming
 
+function_signature: "def num_decodings(s: str) -> int:"
+
+test_cases:
+  visible:
+    - input: { s: "12" }
+      expected: 2
+    - input: { s: "226" }
+      expected: 3
+    - input: { s: "06" }
+      expected: 0
+  hidden:
+    - input: { s: "1" }
+      expected: 1
+    - input: { s: "10" }
+      expected: 1
+    - input: { s: "2101" }
+      expected: 1
+    - input: { s: "11106" }
+      expected: 2
+
 description: |
   You have intercepted a secret message encoded as a string of numbers. The message is **decoded** via the following mapping: