Compilare: user.cpp: In function ‘void update(int)’: user.cpp:33:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (; pos <= v.size(); pos += lsb(pos)) ^ user.cpp: In function ‘int binary_search(int)’: user.cpp:41:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (pos + (1 << i) <= v.size() && aib[pos + (1 << i)] < k) { ^ user.cpp: In function ‘int main()’: user.cpp:71:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v.size(); ++ i) ^