python beats 100% speed
IntuitionApproachComplexity
Time complexity:

Space complexity:
Code
# Intuition
<!-- Describe your first thoughts on how to solve this problem. -->

# Approach
<!-- Describe your approach to solving the problem. -->

# Complexity
- Time complexity:
<!-- Add your time complexity here, e.g. $$O(n)$$ -->

- Space complexity:
<!-- Add your space complexity here, e.g. $$O(n)$$ -->

# Code
```python3 []
class Solution:
    def isFascinating(self, n: int) -> bool:

        concat = list(str(n)+str(2*n)+str(3*n))
        concat.sort()
        concat = "".join(concat)
        if concat == "123456789":
            return True
        else:
            return False
        
```
['Python3']