Compilare: main.cpp: In function 'std::vector<std::vector<long long int> > inmulteste(std::vector<std::vector<long long int> >, std::vector<std::vector<long long int> >)': main.cpp:20:21: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::vector<long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 20 | for(int i = 0; i<ans.size(); i++) | ~^~~~~~~~~~~ main.cpp:25:21: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::vector<long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 25 | for(int i = 0; i<a.size(); i++) | ~^~~~~~~~~ main.cpp:27:25: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 27 | for(int j = 0; j<b[0].size(); j++) | ~^~~~~~~~~~~~ main.cpp:29:29: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 29 | for(int k = 0; k<a[0].size(); k++) | ~^~~~~~~~~~~~