if '~' is replaced with '.' in query string, we can modify processing of query like this:

void process_queries(int q, std::map <std::string, std::string> &attributes)
{
    std::string str;
    for (int i = 0; i < q; i++)
    {
        getline(std::cin, str);
        if (attributes.find(str) == attributes.end())
        {
            size_t pos = str.find("~");
            if (pos != std::string::npos)
            {
                str[pos] = '.';
                if (attributes.find(str) != attributes.end())
                {
                    std::cout << attributes[str] << "\n";
                }
            }
            std::cout << "Not Found!\n";
        }
        else
        {
            std::cout << attributes[str] << "\n";
        }
    }
}