Compilare: user.cpp: In function ‘int main()’: user.cpp:123:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i<H.size()) ^ user.cpp:127:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0;j<L[sav2].size();j++) ^ user.cpp:143:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0;j<so[aut[sav2]].size();j++) ^