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:38:21: 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] 38 | for(int i = 0; i<a.size(); i++) | ~^~~~~~~~~ main.cpp:43:21: 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] 43 | for(int i = 0; i<a.size(); i++) | ~^~~~~~~~~ main.cpp:45:25: 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] 45 | for(int j = 0; j<b[0].size(); j++) | ~^~~~~~~~~~~~ main.cpp:47:29: 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] 47 | for(int k = 0; k<a[0].size(); k++) | ~^~~~~~~~~~~~