In file included from /usr/include/c++/7/bits/char_traits.h:39:0,
from /usr/include/c++/7/ios:40,
from /usr/include/c++/7/istream:38,
from /usr/include/c++/7/sstream:38,
from /usr/include/c++/7/complex:45,
from /usr/include/c++/7/ccomplex:39,
from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:52,
from Main.cc:1:
/usr/include/c++/7/bits/stl_algobase.h: In instantiation of ‘const _Tp& std::max(const _Tp&, const _Tp&, _Compare) [with _Tp = int; _Compare = int]’:
Main.cc:10:22: required from here
/usr/include/c++/7/bits/stl_algobase.h:268:17: error: ‘__comp’ cannot be used as a function
if (__comp(__a, __b))
~~~~~~^~~~~~~~~~