Compilare: user.cpp: In function ‘int main()’: user.cpp:40:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int i = 0; i < V.size()-1; ++i ) ^ user.cpp:57:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int i = 0; i < V2.size(); ++i ) ^ user.cpp:24:9: warning: unused variable ‘aux2’ [-Wunused-variable] int aux2(0); ^ user.cpp:38:9: warning: variable ‘last’ set but not used [-Wunused-but-set-variable] int last; ^