Compilare: user.cpp: In function ‘std::vector<int> KMP(std::string)’: user.cpp:8:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=1;i<s.size();++i){ ^ user.cpp: In function ‘int main()’: user.cpp:27:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=a.size()-b.size();i<Match.size();++i) ^