vector<vector<int>> triangle;

triangle.push_back({ 1 });

if (numRows == 1) return triangle;

else

{

for (int i = 1; i < numRows; ++i)

{

triangle.push_back({ 1 });

for (int index = 0; index < triangle[i - 1].size() - 1; ++index)

triangle.back().push_back(triangle[i - 1][index] + triangle[i - 1][index + 1]);

triangle.back().push_back(1);

}

}

return triangle;