Compilare: main.cpp: In function 'void update(int, int)': main.cpp:21:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 21 | for(int i=x;i<aib.size();i+=lsb(i)) | ~^~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:42:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 42 | for(int i=0;i<b.size();i++) | ~^~~~~~~~~ main.cpp:46:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 46 | for(int i=0;i<a.size();i++) | ~^~~~~~~~~