Easy Python Solution
Code\n\nclass Solution:\n    def isFascinating(self, n: int) -> bool:\n        s=str(n)+str(n*2)+str(n*3)\n        k="123456789"\n        return set(s)==set(k) 
# Code\n```\nclass Solution:\n    def isFascinating(self, n: int) -> bool:\n        s=str(n)+str(n*2)+str(n*3)\n        k="123456789"\n        return set(s)==set(k) and len(s)==9\n```
['Python3']