Compilare: user.cpp: In function ‘bool isClique()’: user.cpp:13:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < take_clique.size(); ++i) { ^ user.cpp:15:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = i + 1; j < take_clique.size(); ++j) { ^ user.cpp: In function ‘void backk(int, int, const std::vector<int>&)’: user.cpp:26:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (level == adj.size()) { ^ user.cpp:28:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (take_clique.size() + 1 > best) { ^ user.cpp:32:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if (take_clique.size() + 1 == best) { ^