feat(content): function signatures + test cases

backend/data/questions/find-the-town-judge.yaml

@@ -10,6 +10,28 @@ categories:
 patterns:
   - greedy
 
+function_signature: "def find_judge(n: int, trust: list[list[int]]) -> int:"
+
+test_cases:
+  visible:
+    - input: { n: 2, trust: [[1, 2]] }
+      expected: 2
+    - input: { n: 3, trust: [[1, 3], [2, 3]] }
+      expected: 3
+    - input: { n: 3, trust: [[1, 3], [2, 3], [3, 1]] }
+      expected: -1
+  hidden:
+    - input: { n: 1, trust: [] }
+      expected: 1
+    - input: { n: 2, trust: [] }
+      expected: -1
+    - input: { n: 4, trust: [[1, 3], [1, 4], [2, 3], [2, 4], [4, 3]] }
+      expected: 3
+    - input: { n: 3, trust: [[1, 2], [2, 3]] }
+      expected: -1
+    - input: { n: 4, trust: [[1, 2], [1, 3], [2, 1], [2, 3], [1, 4], [4, 3], [4, 1]] }
+      expected: 3
+
 description: |
   In a town, there are `n` people labeled from `1` to `n`. There is a rumor that one of these people is secretly the town judge.