View Compilation Error

0_0_35730755_8921.cpp: In function 'int main()':
0_0_35730755_8921.cpp:43:21: error: 'make_unique' was not declared in this scope
         auto grid = make_unique<vector<vector<char>>>(h);
                     ^
0_0_35730755_8921.cpp:43:53: error: expected primary-expression before '>' token
         auto grid = make_unique<vector<vector<char>>>(h);
                                                     ^