class Solution {
public:
    vector<int> getRow(int rowIndex) {
        vector<vector<int>> vv;
        vv.resize(++rowIndex);
        for(size_t i=0;i<vv.size();i++)
        {
            vv[i].resize(i+1,0);
            vv[i].front() = vv[i].back() = 1;
        }
        size_t row = 0;
        for(size_t i=0;i<vv.size();i++)
        {
            for(size_t j=0;j<vv[i].size();++j)
            {
                if(vv[i][j] == 0)
                {
                    vv[i][j] = vv[i-1][j]+vv[i-1][j-1];
                }
            }
            row = i;
        }
        return vv[row];
    }
};