Compilare: user.cpp: In function ‘void verificare()’: user.cpp:15:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<v[k].size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:32:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0; j<t[i].size(); j++) ^