Compilare: user.cpp: In function ‘int main()’: user.cpp:87:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<pos.size();i++) ^ user.cpp:56:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("Insule.in","rt",stdin); ^ user.cpp:57:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("Insule.out","wt",stdout); ^