Compilare: main.cpp: In member function 'void fenwick_tree::update(int32, int32)': main.cpp:19:35: warning: comparison of integer expressions of different signedness: 'int32' {aka 'int'} and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 19 | for (int32 i = pos + 1; i < tree.size(); i += lsbl(i)) { | ~~^~~~~~~~~~~~~