Compilare: main.cpp: In constructor 'LazyBIT2D::LazyBIT2D(int, int)': main.cpp:54:32: warning: 'LazyBIT2D::t' will be initialized after [-Wreorder] 54 | vector <vector <int>> pos, t; | ^ main.cpp:54:27: warning: 'std::vector<std::vector<int> > LazyBIT2D::pos' [-Wreorder] 54 | vector <vector <int>> pos, t; | ^~~ main.cpp:57:5: warning: when initialized here [-Wreorder] 57 | LazyBIT2D(int _n, int _m) : n(_n), m(_m), t(_n + 1), pos(_n + 1) {} | ^~~~~~~~~ main.cpp: In member function 'void LazyBIT2D::add(int, int, int)': main.cpp:72:96: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 72 | for(int cy = lower_bound(pos[x].begin(), pos[x].end(), y) - pos[x].begin() + 1; cy < t[x].size(); cy += lsb(cy)) | ~~~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:108:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17' 108 | for(auto [x, y] : queries) { | ^