Compilare: user.cpp: In function ‘int main()’: user.cpp:44:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int i = 0; i < V.size(); ++i ) ^ user.cpp:65:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int i = 0; i < V2.size(); ++i ) ^ user.cpp:24:9: warning: variable ‘aux2’ set but not used [-Wunused-but-set-variable] int aux2(0); ^ user.cpp:59:5: warning: ‘last’ may be used uninitialized in this function [-Wmaybe-uninitialized] if ( last == 0 ) ^