3 lines || C++ || Easy
CodeHappy Coding!Radhe Radhe😊

# Code
```
class Solution {
public:
    bool isFascinating(int n) {
        string str= to_string(n)+to_string(2*n)+to_string(3*n);
        sort(str.begin(),str.end());
        return str == "123456789";
    }
};
```

**Happy Coding!**
Radhe Radhe😊
['C++']