refactor(algorithms, greedy): gas stations

Author: BrianLusina

puzzles/arrays/gas_stations/README.md algorithms/greedy/gas_stations/README.mdpuzzles/arrays/gas_stations/README.md renamed to algorithms/greedy/gas_stations/README.md

@@ -0,0 +1,18 @@
+import unittest
+from typing import List
+from parameterized import parameterized
+from algorithms.greedy.gas_stations import can_complete_circuit
+
+
+class CanCompleteCircuitTestCase(unittest.TestCase):
+    @parameterized.expand([
+        ([1,2,3,4,5],[3,4,5,1,2],3),
+        ([2,3,4],[3,4,3],-1),
+        ([1, 2],[2,1],1),
+    ])
+    def test_can_complete_circuit(self, gas: List[int], cost: List[int], expected: int):
+        actual = can_complete_circuit(gas, cost)
+        self.assertEqual(expected, actual)
+
+if __name__ == "__main__":
+    unittest.main()