simple cpp solution
bool checkIfPangram(string sentence) {\n        \n        sets;\n        for(int i=0;i<sentence.size();i++)\n            s.insert(sentence[i]);\n        int n=s
bool checkIfPangram(string sentence) {\n        \n        set<char>s;\n        for(int i=0;i<sentence.size();i++)\n            s.insert(sentence[i]);\n        int n=s.size();\n        if(n==26)\n            return true;\n        else\n            return false;\n        \n    }
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