View Compilation Error

0_0_15034902_6900.cpp: In function 'bool bfs()':
0_0_15034902_6900.cpp:30:11: error: 'class std::queue<int>' has no member named 'erase'
         Q.erase(Q.begin());  
           ^
0_0_15034902_6900.cpp:30:19: error: 'class std::queue<int>' has no member named 'begin'
         Q.erase(Q.begin());  
                   ^
0_0_15034902_6900.cpp:33:19: error: 'graph' was not declared in this scope
             int p=graph[tempnode][i];  
                   ^
0_0_15034902_6900.cpp:37:19: error: 'class std::queue<int>' has no member named 'push_back'
                 Q.push_back(p);  
                   ^