feat(content): hidden test cases

backend/data/questions/check-if-point-is-reachable.yaml

@@ -8,6 +8,28 @@ categories:
 patterns:
   - greedy
 
+function_signature: "def is_reachable(target_x: int, target_y: int) -> bool:"
+
+test_cases:
+  visible:
+    - input: { target_x: 6, target_y: 9 }
+      expected: false
+    - input: { target_x: 4, target_y: 7 }
+      expected: true
+  hidden:
+    - input: { target_x: 1, target_y: 1 }
+      expected: true
+    - input: { target_x: 2, target_y: 2 }
+      expected: true
+    - input: { target_x: 1, target_y: 2 }
+      expected: true
+    - input: { target_x: 3, target_y: 3 }
+      expected: false
+    - input: { target_x: 8, target_y: 16 }
+      expected: true
+    - input: { target_x: 5, target_y: 10 }
+      expected: false
+
 description: |
   There exists an infinitely large grid. You are currently at point `(1, 1)`, and you need to reach the point `(targetX, targetY)` using a finite number of steps.