Compilare: user.cpp: In function ‘void prefix()’: user.cpp:15:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int q=2; q<P.size(); q++) ^ user.cpp: In function ‘void match()’: user.cpp:29:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<T.size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:50:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<result.size();i++) ^