Compilare: main.cpp: In function 'void DFS(int, const std::vector<std::vector<int> >&, std::vector<bool>&, std::vector<int>&, std::vector<int>&, std::vector<std::vector<std::pair<int, int> > >&, std::stack<std::pair<int, int> >&)': main.cpp:53:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int k = 0; k < adj[i].size(); ++k){ ~~^~~~~~~~~~~~~~~ main.cpp: In function 'void print_bicon_comp(std::vector<std::vector<std::pair<int, int> > >&)': main.cpp:88:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < bicon_comp.size(); ++i) ~~^~~~~~~~~~~~~~~~~~~ main.cpp:94:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < bicon_comp[i].size(); ++j) ~~^~~~~~~~~~~~~~~~~~~~~~