Compilare: main.cpp: In constructor 'FakeBIT2D::FakeBIT2D(int)': main.cpp:54:9: warning: 'FakeBIT2D::n' will be initialized after [-Wreorder] 54 | int n; | ^ main.cpp:53:51: warning: 'std::unordered_map<int, std::unordered_map<int, int> > FakeBIT2D::t' [-Wreorder] 53 | unordered_map <int, unordered_map <int, int>> t; | ^ main.cpp:57:5: warning: when initialized here [-Wreorder] 57 | FakeBIT2D(int _n) : n(_n), t(n + 1) {} | ^~~~~~~~~ main.cpp: In function 'int main()': main.cpp:57:34: warning: 'B.FakeBIT2D::n' is used uninitialized in this function [-Wuninitialized] 57 | FakeBIT2D(int _n) : n(_n), t(n + 1) {} | ^