antic.cpp: In function `int comp(int, int)': antic.cpp:13: warning: comparison between signed and unsigned integer expressions antic.cpp: In function `int main()': antic.cpp:36: warning: passing NULL used for non-pointer argument 3 of `void std::fill(_ForwardIter, _ForwardIter, const _Tp&) [with _ForwardIter = char*, _Tp = int]' antic.cpp:38: warning: passing NULL used for non-pointer argument 3 of `void std::fill(_ForwardIter, _ForwardIter, const _Tp&) [with _ForwardIter = char*, _Tp = int]' antic.cpp:40: warning: passing NULL used for non-pointer argument 3 of `void std::fill(_ForwardIter, _ForwardIter, const _Tp&) [with _ForwardIter = char*, _Tp = int]' antic.cpp:47: warning: passing NULL used for non-pointer argument 3 of `void std::fill(_ForwardIter, _ForwardIter, const _Tp&) [with _ForwardIter = char*, _Tp = int]' antic.cpp:50: warning: passing NULL used for non-pointer argument 3 of `void std::fill(_ForwardIter, _ForwardIter, const _Tp&) [with _ForwardIter = char*, _Tp = int]' antic.cpp:55: warning: passing NULL used for non-pointer argument 3 of `void std::fill(_ForwardIter, _ForwardIter, const _Tp&) [with _ForwardIter = char*, _Tp = int]' antic.cpp:57: warning: passing NULL used for non-pointer argument 3 of `void std::fill(_ForwardIter, _ForwardIter, const _Tp&) [with _ForwardIter = char*, _Tp = int]' antic.cpp:59: warning: passing NULL used for non-pointer argument 3 of `void std::fill(_ForwardIter, _ForwardIter, const _Tp&) [with _ForwardIter = char*, _Tp = int]'