Compilare: user.cpp: In function ‘int main()’: user.cpp:73:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(ind < events.size() && events[ind].fi < Q[i].fi.fi) ^ user.cpp:48:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("kinetic.in","r",stdin); ^ user.cpp:49:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("kinetic.out","w",stdout); ^