class Solution {

public:

    string countAndSay(int n) {

        string ans_str;

        vector<int> input;

        input.push_back(); // the first time

        vector<int> output;

        for(int i = ;i<n;i++)

        {

            fun(input,output);

            input = output;

        }

        for(int i = ;i<input.size();i++)

            ans_str.push_back(''+input[i]);

        return ans_str;

    }

    void fun(vector<int> input,vector<int> &output)

    {

        output.clear();

        int itr = ;

        while(itr<input.size())

        {

            int value = input[itr];

            int times = ;

            while(itr<input.size()&&input[itr]==value)

            {

                times++;

                itr++;

            }

            output.push_back(times);

            output.push_back(value);

        }

    }

};