Compilare: main.cpp: In member function 'void _AIB::update(int, int)': main.cpp:97:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 97 | while (i < bit.size()) { | ~~^~~~~~~~~~~~ main.cpp: In function 'int32_t main()': main.cpp:145:19: warning: macro expands to multiple statements [-Wmultistatement-macros] 145 | #define fast_io() ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL) | ^~~~~~~~ main.cpp:156:17: note: in expansion of macro 'fast_io' 156 | fast_io(); | ^~~~~~~ main.cpp:155:9: note: some parts of macro expansion are not guarded by this 'if' clause 155 | if (use_fastio) | ^~