Compilare: user.cpp: In function ‘void add_to_fenwick(std::vector<int>&, int, int)’: user.cpp:8:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (; poz < fenwick.size(); poz += fenwick_delta(poz)) { ^ user.cpp: In function ‘void citeste_date(FILE*, int&, std::vector<int>&)’: user.cpp:23:37: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, " %d %d ", &n, &m); ^ user.cpp:26:38: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, " %d ", &x); ^ user.cpp: In function ‘int main()’: user.cpp:38:38: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, " %d %d %d ", &t, &a, &b); ^