Compilare: user.cpp: In function ‘int hashFunction(std::string)’: user.cpp:15:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < s.size(); ++i){ ^ user.cpp: In function ‘std::vector<int> stringMatching(std::string, std::string)’: user.cpp:25:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i <= a.size() - b.size(); ++i){ ^