Leetcode 500: Keyboard row

#include<iostream>
#include<vector>
#include<locale>


class solution{
public:
    bool find(std::string word, std::string row)
    {
        for(size_t i = 0; i<word.size(); i++)
        {
            if(row.find(std::tolower(word[i])) == std::string::npos)
            {
                return false;
            }
        }
        return true;
    }


    std::vector<std::string>findWords(std::vector<std::string>&words)
    {
        std::string row1 = "qwertyuiop";

        std::string row2 = "asdfghjkl";

        std::string row3 = "zxcvbnm";

        std::vector<std::string>result;

        for(std::string & word : words)
        {
            if(find(word, row1) || find(word, row2) || find(word, row3))
            {
                result.push_back(word);
            }
        }
        return result;

    }


};

int main()
{
    solution sol;

       std::string word;

       std::vector<std::string>temp;

       std::vector<std::string>input;

       int T;

          std::cout<<"how many word do you want to input"<<std::endl;

          std::cin>>T;

          for(int i=0; i<(T+1); i++)
          {

           std::getline(std::cin, word);

           input.push_back(word);

       }

     temp = sol.findWords(input);


    for(size_t i=0; i<temp.size(); i++)
       {

           std::cout<<temp[i]<<std::endl;

       }
}