View Compilation Error

0_0_34271848_13180.cpp: In function 'int tarjan(int)':
0_0_34271848_13180.cpp:26:43: error: 'count_circle' was not declared in this scope
         bcc.push_back(u), count_circle(bcc);
                                           ^
0_0_34271848_13180.cpp: In function 'int main()':
0_0_34271848_13180.cpp:51:7: error: 'Low' was not declared in this scope
       Low[i] = Pre[i] = 0, G[i].clear();
       ^