Leetcode 500: Keyboard row

#include <iostream>
#include<string>
#include<vector>
#include<algorithm>


class solution{


public:

    std::vector<std::string>findWords(std::vector<std::string>& words)
    {

        char row1[] ={'q','w','e','r','t','y','u','i','o','p','Q','W','E','R','T','Y','U','I','O','P'};

        char row2[] ={'a','s','d','f','g','h','j','k','l','A','S','D','F','G','H','J','K','L'};

        char row3[]={'z','x','c','v','b','n','m','Z','X','C','V','B','N','M'};

        bool result[words.size()+1];



        // iterate through the words

        for(size_t i =0; i<words.size(); i++)
        {
            result[i] = true;

            char *found;



            // search through row1

            found = std::find(row1, row1+20, words[i][0]); //if first letter is found in row 1

            if(found != row1+20)
            {

                for(size_t j = 1; j<words[i].size(); j++) //iterate to check if others are there too
                {

                    found = std::find(row1, row1+20, words[i][j]);

                    if(found == row1+20) //
                    {

                        result[i] = false;

                        break;
                    }
                }
            }



            // search through row2

            found = std::find(row2, row2+18, words[i][0]);

            if(found != row2+18)
            {

                for(size_t j = 1; j<words[i].size(); j++)
                {

                    found = std::find(row2, row2+18, words[i][j]);

                    if(found == row2+18)
                    {

                        result[i] = false;

                        break;

                    }
                }
            }




            // search through row3

            found = std::find(row3, row3+14, words[i][0]);

            if(found != row3+14)
            {

                for(size_t j = 1; j<words[i].size(); j++)
                {

                    found = std::find(row3, row3+14, words[i][j]);

                    if(found == row3+14)
                    {

                        result[i] = false;

                        break;

                    }
                }
            }


        }

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

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

            if(result[i])
            {

                temp.push_back(words[i]);

            }

        }

        return temp;
   }

};

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;

   }

}