View Compilation Error

0_0_37451353_41.cpp:3:14: error: 'N' was not declared in this scope
 vector<int>E[N];map<string,int>mp;
              ^
0_0_37451353_41.cpp: In function 'void dfs(int)':
0_0_37451353_41.cpp:8:16: error: 'E' was not declared in this scope
  for(int i=0;i<E[u].size();i++){
                ^
0_0_37451353_41.cpp: In function 'int main()':
0_0_37451353_41.cpp:32:4: error: 'E' was not declared in this scope
    E[i].clear();
    ^
0_0_37451353_41.cpp:38:3: error: 'E' was not declared in this scope
   E[0].push_back(mp[s1]);
   ^