C++ || Well Commented
\n\n# Code\n\nclass Solution {\npublic:\n    bool isValidSerialization(string preorder) {\n        int nodes=1;\n        preorder+=\',\';\n        for(int i=0;i
\n\n# Code\n```\nclass Solution {\npublic:\n    bool isValidSerialization(string preorder) {\n        int nodes=1;\n        preorder+=\',\';\n        for(int i=0;i<preorder.size();i++){\n            if(preorder[i]!=\',\')continue;//comma seperated values of nodes\n            nodes--; //after taking each node decrease value of left nodes\n            if(nodes<0)return false;\n            if(preorder[i-1]!=\'#\')nodes+=2;//if current node is not null means it will 2 childs si increase by 2;\n        }\n        return nodes==0;\n        \n    }\n};\n```
['C++']