Simple Java Solution
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
```java []
class Solution {
    public boolean isFascinating(int n) {
        int num=2;
        String s=n+"";
        while(s.length()<9){
            s=s+(n*num)+"";
            num++;
        }
        int[] dp=new int[10];
        for(int i=0;i<s.length();i++){
            int g=s.charAt(i)-'0';
            dp[g]++;
        }
        for(int i=1;i<=9;i++){
            if(dp[i]!=1)
            return false;
        }
        return true;
    }
}
```
['Java']