Compilare: main.cpp: In instantiation of 'void FenwickTree<T>::add(int, T) [with T = int]': main.cpp:80:17: required from here main.cpp:34:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 34 | while (poz<bit.size()) { | ~~~^~~~~~~~~~~ main.cpp: In instantiation of 'int FenwickTree<T>::binary_lifting(T) [with T = int]': main.cpp:84:38: required from here main.cpp:56:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 56 | if (ret+step>bit.size()) continue; | ~~~~~~~~^~~~~~~~~~~