Compilare: user.cpp: In function ‘void bfs(int)’: user.cpp:32:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<V[T][troll].size(); ++i) ^ user.cpp:40:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<V[T][gone[i]].size(); ++j) ^