feat(content): function signatures + test cases

backend/data/questions/array-nesting.yaml

@@ -8,6 +8,26 @@ categories:
 patterns:
   - dfs
 
+function_signature: "def array_nesting(nums: list[int]) -> int:"
+
+test_cases:
+  visible:
+    - input: { nums: [5, 4, 0, 3, 1, 6, 2] }
+      expected: 4
+    - input: { nums: [0, 1, 2] }
+      expected: 1
+  hidden:
+    - input: { nums: [0] }
+      expected: 1
+    - input: { nums: [1, 0] }
+      expected: 2
+    - input: { nums: [0, 2, 1] }
+      expected: 2
+    - input: { nums: [2, 0, 1] }
+      expected: 3
+    - input: { nums: [1, 2, 3, 0] }
+      expected: 4
+
 description: |
   You are given an integer array `nums` of length `n` where `nums` is a permutation of the numbers in the range `[0, n - 1]`.