Compilare: user.cpp: In function ‘int main()’: user.cpp:40:48: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<vect1[a[x]].size();j++) ^ user.cpp:31:11: warning: unused variable ‘l’ [-Wunused-variable] int l=vect1[a[x]].size(); ^ user.cpp:32:23: warning: unused variable ‘aux1’ [-Wunused-variable] int aux=a[a[y]],aux1; ^ user.cpp:53:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<vect.size();i++) ^