Compilare: main.cpp: In function 'std::vector<std::vector<int> > inmultire(std::vector<std::vector<int> >&, std::vector<std::vector<int> >&)': main.cpp:14:30: warning: unused variable 'n2' [-Wunused-variable] 14 | int m2 = mat2[0].size(), n2 = mat2.size(); | ^~ main.cpp: In function 'std::vector<std::vector<int> > ridicare(std::vector<std::vector<int> >&, int)': main.cpp:35:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 35 | for(int i=0; i<res.size(); i++) | ~^~~~~~~~~~~ main.cpp:36:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 36 | for(int j=0; j<res.size(); j++) | ~^~~~~~~~~~~