Compilare: main.cpp: In instantiation of 'Matrix<T>::Matrix(int, int) [with T = int]': main.cpp:88:20: required from here main.cpp:66:7: warning: 'Matrix<int>::cols_' will be initialized after [-Wreorder] int cols_; ^~~~~ main.cpp:64:21: warning: 'std::vector<std::vector<int, std::allocator<int> >, std::allocator<std::vector<int, std::allocator<int> > > > Matrix<int>::data_' [-Wreorder] vector<vector<T>> data_; ^~~~~ main.cpp:10:3: warning: when initialized here [-Wreorder] Matrix(int n, int m): rows_(n), cols_(m), data_(n, vector<T>(m)) {} ^~~~~~ main.cpp: In function 'int main()': main.cpp:84:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("kfib.in", "r", stdin); ^ main.cpp:85:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("kfib.out", "w", stdout); ^ main.cpp:91:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &K); ^