Compilare: main.cpp: In function 'void upd(std::vector<int>&, int, int)': main.cpp:5:22: 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:42:30: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("s2c.in","r",stdin); ^ main.cpp:43:32: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("s2c.out","w",stdout); ^