3 lines easy c++ solution ✅✅
Intuition\n Describe your first thoughts on how to solve this problem. \n\n# Approach\n Describe your approach to solving the problem. \n\n# Complexity\n- Time 
# Intuition\n<!-- Describe your first thoughts on how to solve this problem. -->\n\n# Approach\n<!-- Describe your approach to solving the problem. -->\n\n# Complexity\n- Time complexity:\nO(NlogN)\n\n- Space complexity:\nO(1)\n\n# Code\n```\nclass Solution {\npublic:\n    bool isFascinating(int n) {\n        \n        string s = to_string(n) + to_string(n * 2) + to_string(n * 3);\n        sort(s.begin(), s.end());\n\n        if(s == "123456789") return true;\n        return false;\n    }\n};\n```
['String', 'Sorting', 'C++']