Compilare: user.cpp: In function 'void StronglyConnectedComponent(const Graph&, Node*, std::stack<int, std::deque<int, std::allocator<int> > >&, int, int&, Scc&, int&)': user.cpp:47: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'int StronglyConnectedComponents(const Graph&, Scc&)': user.cpp:82: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'int main()': user.cpp:120: warning: comparison between signed and unsigned integer expressions user.cpp:143: warning: comparison between signed and unsigned integer expressions user.cpp:145: warning: comparison between signed and unsigned integer expressions