Compilare: user.cpp: In function ‘int main()’: user.cpp:71:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<_vNumbers.size(); i++) ^ user.cpp:73:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while ((i<_vNumbers.size())&&(_vNumbers[i]==_vNumbers[i+1])) i++; ^ user.cpp:78:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<_vTickets.size(); i++) ^ user.cpp:79:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0; j<_vTickets.size(); j++) ^ user.cpp:80:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (q=0; q<_vTickets.size(); q++) ^ user.cpp:93:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<_vTickets.size(); i++) ^ user.cpp:94:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0; j<_vTickets.size(); j++) ^ user.cpp:95:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (q=0; q<_vTickets.size(); q++) ^