Compilare: user.cpp: In function ‘void Erase(std::pair<int, int>)’: user.cpp:32:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < table[which].size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:51:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < s.size(); i++) ^ user.cpp:71:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < s.size(); i++) ^