Hackerrrank best solution for Designer PDF viewer

Here is a simple and easiest way to implement this function in c++: 

int designerPdfViewer(vector<int> h, string word) {

    vector<int> height;

    for(int i=0; i<word.length(); i++){

        char ch= word.at(i);

        int l=ch-97;

        cout<<l<<" ";

        height.push_back(h[l]);

    }

    int max=*max_element(height.begin(), height.end());

    return max*word.length();

}