Compilare: user.cpp: In function ‘int rollingHash(std::string, int)’: user.cpp:25:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < s.size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:46:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i < pattern.size(); i++) ^ user.cpp:49:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < text.size(); i++) ^ user.cpp:59:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i + 1 >= pattern.size()) ^ user.cpp:68:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < matches.size(); i++) ^