Compilare: main.cpp: In function 'std::vector<std::vector<long long int> > matrixProd(std::vector<std::vector<long long int> >, std::vector<std::vector<long long int> >)': main.cpp:14:9: warning: unused variable 'n2' [-Wunused-variable] 14 | int n2 = mx2.size(); | ^~ main.cpp: In function 'int main()': main.cpp:62:8: warning: unused variable 'i' [-Wunused-variable] 62 | ll i = 0, j, n, nr; | ^ main.cpp:62:15: warning: unused variable 'j' [-Wunused-variable] 62 | ll i = 0, j, n, nr; | ^ main.cpp:62:21: warning: unused variable 'nr' [-Wunused-variable] 62 | ll i = 0, j, n, nr; | ^~