Python, easy solution with Hashmap
make dictionary, key = source, value = destination\n check the value not in the key, this means Destination City*\n\n\nclass Solution(object):\n    def destCity
* make dictionary, key = source, value = destination\n* check the value not in the key, this means **Destination City**\n\n```\nclass Solution(object):\n    def destCity(self, paths):\n        """\n        :type paths: List[List[str]]\n        :rtype: str\n        """\n        d = collections.defaultdict(str)\n        for path in paths:\n            src = path[0]\n            dst = path[1]\n            d[src] = dst\n        for k, v in d.items():\n            if v not in d:\n                return v        \n```
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