Compilare: user.cpp: In constructor ‘FenwickTree::FenwickTree(int)’: user.cpp:74:9: warning: ‘FenwickTree::size’ will be initialized after [-Wreorder] int size; ^ user.cpp:73:17: warning: ‘std::vector<int> FenwickTree::tree’ [-Wreorder] vector<int> tree; ^ user.cpp:54:5: warning: when initialized here [-Wreorder] FenwickTree(int n): ^ user.cpp: In member function ‘int FenwickTree::update(int, int)’: user.cpp:61:5: warning: no return statement in function returning non-void [-Wreturn-type] } ^