View Compilation Error

0_0_29298421_24173.cpp:15:16: error: 'maxn' was not declared in this scope
 vector<edge> G[maxn];
                ^
0_0_29298421_24173.cpp: In function 'void dijkstra2(ll)':
0_0_29298421_24173.cpp:40:17: error: 'G' was not declared in this scope
   for (ll i=0;i<G[v].size();i++)
                 ^
0_0_29298421_24173.cpp: In function 'int main()':
0_0_29298421_24173.cpp:86:4: error: 'G' was not declared in this scope
    G[i].clear();
    ^
0_0_29298421_24173.cpp:109:4: error: 'G' was not declared in this scope
    G[a].push_back(temp);
    ^