Compilare: user.cpp: In member function ‘int solution::calculeaza_suma(std::vector<std::vector<int> >&)’: user.cpp:22:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<mm.size();i++){ ^ user.cpp:23:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<mm[0].size();j++){ ^ user.cpp: In member function ‘void solution::genereaza_matrice(std::vector<std::vector<int> >)’: user.cpp:31:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<mm.size();i++){ ^ user.cpp:33:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<mm[0].size();j++){ ^ user.cpp:38:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<aux.size()-mm.size();i++){ ^ user.cpp:40:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<mm.size();j++){ ^