Compilare: main.cpp: In member function 'Matrix Matrix::operator*(Matrix&)': main.cpp:25:13: warning: unused variable 'B' [-Wunused-variable] 25 | int B = this->m; | ^ main.cpp: In member function 'Matrix Matrix::operator^(int)': main.cpp:48:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 48 | for(int i = 0; i<x.size(); i++){ | ~^~~~~~~~~ main.cpp:49:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 49 | for(int j = 0; j<x[i].size(); j++){ | ~^~~~~~~~~~~~