Super Easy Solution | Beginner Friendly | Beats 100%
Code


# Code
```python3 []
class Solution:
    def isFascinating(self, n: int) -> bool:
        res=""
        d="123456789"
        res+=str(n)+str(2*n)+str(3*n)
        if len(res)!=9:  
            return False
        for i in d:
            if i not in res:
                return False
        return True
        
```
['Python3']