View Compilation Error

0_0_30117387_28907.cpp: In function 'int main()':
0_0_30117387_28907.cpp:53:60: error: 'upper_bound' was not declared in this scope
                     p=upper_bound(G[i].begin(),G[i].end(),r)-lower_bound(G[i].begin(),G[i].end(),l);
                                                            ^
0_0_30117387_28907.cpp:62:56: error: 'upper_bound' was not declared in this scope
                 p=upper_bound(G[e].begin(),G[e].end(),r)-lower_bound(G[e].begin(),G[e].end(),l);
                                                        ^