Compilare: user.cpp: In function ‘void printGraph(std::vector<std::vector<int, std::allocator<int> >, std::allocator<std::vector<int, std::allocator<int> > > >)’: user.cpp:11: warning: comparison between signed and unsigned integer expressions user.cpp:12: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void dfs(const std::vector<std::vector<int, std::allocator<int> >, std::allocator<std::vector<int, std::allocator<int> > > >&, int, int, int&, std::vector<int, std::allocator<int> >&, std::vector<bool, std::allocator<bool> >&, std::set<int, std::less<int>, std::allocator<int> >&)’: user.cpp:45: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int main()’: user.cpp:85: warning: comparison between signed and unsigned integer expressions user.cpp:97: warning: comparison between signed and unsigned integer expressions user.cpp:63: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:68: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result