feat(content): hidden test cases

backend/data/questions/check-if-it-is-a-good-array.yaml

@@ -9,6 +9,30 @@ categories:
 patterns:
   - greedy
 
+function_signature: "def is_good_array(nums: list[int]) -> bool:"
+
+test_cases:
+  visible:
+    - input: { nums: [12, 5, 7, 23] }
+      expected: true
+    - input: { nums: [29, 6, 10] }
+      expected: true
+    - input: { nums: [3, 6] }
+      expected: false
+  hidden:
+    - input: { nums: [1] }
+      expected: true
+    - input: { nums: [2, 4, 6, 8] }
+      expected: false
+    - input: { nums: [6, 9, 15, 21] }
+      expected: false
+    - input: { nums: [5, 7] }
+      expected: true
+    - input: { nums: [100, 99] }
+      expected: true
+    - input: { nums: [2, 3] }
+      expected: true
+
 description: |
   Given an array `nums` of positive integers. Your task is to select some subset of `nums`, multiply each element by an integer and add all these numbers.