View Compilation Error

0_0_14669134_16481.cpp: In function 'void init()':
0_0_14669134_16481.cpp:35:29: error: 'G' was not declared in this scope
     for(int i=0; i<=N; i++) G[i].clear();
                             ^
0_0_14669134_16481.cpp: In function 'int Tarjan(int, int)':
0_0_14669134_16481.cpp:71:20: error: 'G' was not declared in this scope
     for(int i=0; i<G[u].size(); i++)
                    ^
0_0_14669134_16481.cpp:74:17: error: 'edge' was not declared in this scope
         if(!dfn[edge[B].to])
                 ^
0_0_14669134_16481.cpp: In function 'void Dfs(int, int)':
0_0_14669134_16481.cpp:98:19: error: 'G' was not declared in this scope
     for(int i=0;i<G[x].size();i++)
                   ^
0_0_14669134_16481.cpp:101:18: error: 'edge' was not declared in this scope
         if(!flag[edge[B].id/2])
                  ^
0_0_14669134_16481.cpp: In function 'void Slove()':
0_0_14669134_16481.cpp:117:12: error: 'edge' was not declared in this scope
         if(edge[i].ans)
            ^