View Compilation Error

In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/algorithm:61:0,
                 from 0_0_19399838_883.cpp:2:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algobase.h: In instantiation of 'const _Tp& std::max(const _Tp&, const _Tp&, _Compare) [with _Tp = long long int; _Compare = long long int]':
0_0_19399838_883.cpp:28:65:   required from here
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algobase.h:264:26: error: '__comp' cannot be used as a function
       if (__comp(__a, __b))
                          ^