✅ Simple | Beginners friendly | C++ Solution 🚀
\nclass Solution {\npublic:\n    bool isFascinating(int n) {\n        \n        string s1 = to_string(n);\n        string s2 = to_string(2*n);\n        string s
```\nclass Solution {\npublic:\n    bool isFascinating(int n) {\n        \n        string s1 = to_string(n);\n        string s2 = to_string(2*n);\n        string s3 = to_string(3*n);\n        \n        string s = s1 + s2 + s3;\n        \n        unordered_map<char, int> mp;\n        \n        for(auto c: s){\n            if(mp[c] == 1 || c == \'0\'){\n                return false;\n            }\n            mp[c] =1;\n        }\n        return true;\n    }\n};\n```
['String', 'C']