Compilare: user.cpp: In function ‘int main()’: user.cpp:38:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int i = 0; i < V.size(); ++i ) ^ user.cpp:45:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int j = i+1; j < V.size(); ++j ) ^ user.cpp:60:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int i = 0; i < V2.size(); ++i ) ^ user.cpp:18:9: warning: variable ‘aux2’ set but not used [-Wunused-but-set-variable] int aux2(0); ^