Compilare: user.cpp: In function ‘bool comps(std::string&, std::string&, int)’: user.cpp:26:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < str.length(); i++) ^ user.cpp: In function ‘void rabin(std::string&, std::string&, std::vector<int>&)’: user.cpp:41:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = str.length(); i < lstr.length(); i++) ^