Compilare: main.cpp: In member function 'void aib::update(int, int)': main.cpp:10:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 10 | for (int i = x; i < a.size(); i += (i & (-i))) | ~~^~~~~~~~~~ main.cpp: In member function 'long long int aib::query(int)': main.cpp:14:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 14 | if (x >= a.size()) | ~~^~~~~~~~~~~ main.cpp: In member function 'int aib::obs(long long int, bool)': main.cpp:26:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 26 | if (ans + i >= a.size()) | ~~~~~~~~^~~~~~~~~~~