Compilare: main.cpp: In function 'void upd(int, int, std::vector<int>&)': main.cpp:47:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = poz; i < aib.size(); i += i&(-i)) ~~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:98:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("lexicografic.in","r",stdin); ^ main.cpp:99:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("lexicografic.out","w",stdout); ^