View Compilation Error

0_0_30542137_18468.cpp: In function 'int main()':
0_0_30542137_18468.cpp:107:27: error: 'sort' was not declared in this scope
     sort(v.begin(),v.end());
                           ^
0_0_30542137_18468.cpp:108:38: error: 'unique' was not declared in this scope
     v.erase(unique(v.begin(), v.end()), v.end());
                                      ^