feat(content): function signatures + test cases

backend/data/questions/boats-to-save-people.yaml

@@ -11,6 +11,32 @@ patterns:
   - two-pointers
   - greedy
 
+function_signature: "def num_rescue_boats(people: list[int], limit: int) -> int:"
+
+test_cases:
+  visible:
+    - input: { people: [1, 2], limit: 3 }
+      expected: 1
+    - input: { people: [3, 2, 2, 1], limit: 3 }
+      expected: 3
+    - input: { people: [3, 5, 3, 4], limit: 5 }
+      expected: 4
+  hidden:
+    - input: { people: [1], limit: 3 }
+      expected: 1
+    - input: { people: [5, 5, 5, 5], limit: 5 }
+      expected: 4
+    - input: { people: [1, 1, 1, 1], limit: 3 }
+      expected: 2
+    - input: { people: [1, 2, 3, 4, 5], limit: 5 }
+      expected: 3
+    - input: { people: [2, 2, 2, 2], limit: 4 }
+      expected: 2
+    - input: { people: [3, 8, 1, 4, 6, 5, 2, 7], limit: 9 }
+      expected: 5
+    - input: { people: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1], limit: 2 }
+      expected: 5
+
 description: |
   You are given an array `people` where `people[i]` is the weight of the i<sup>th</sup> person, and an **infinite number of boats** where each boat can carry a maximum weight of `limit`. Each boat carries **at most two people** at the same time, provided the sum of the weight of those people is at most `limit`.