✅✔ SIMPLE PYTHON3 SOLUTION ✅✔ using sets
UPVOTE me if it is helpful\n\nclass Solution:\n    def destCity(self, paths: List[List[str]]) -> str:\n        source = set()\n        dest = set()\n        for
***UPVOTE*** me if it is helpful\n``` \nclass Solution:\n    def destCity(self, paths: List[List[str]]) -> str:\n        source = set()\n        dest = set()\n        for l in paths:\n            source.add(l[0])\n            dest.add(l[1])\n        return list(dest - source)[0]\n```
['Ordered Set', 'Python', 'Python3']