View Compilation Error

0_0_36381236_31506.cpp: In function 'int main()':
0_0_36381236_31506.cpp:19:13: error: incomplete type 'std::ios {aka std::basic_ios<char>}' used in nested name specifier
 #define IOS ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
             ^
0_0_36381236_31506.cpp:68:2: note: in expansion of macro 'IOS'
  IOS;
  ^
0_0_36381236_31506.cpp:19:41: error: 'cin' was not declared in this scope
 #define IOS ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
                                         ^
0_0_36381236_31506.cpp:68:2: note: in expansion of macro 'IOS'
  IOS;
  ^
0_0_36381236_31506.cpp:19:52: error: 'cout' was not declared in this scope
 #define IOS ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
                                                    ^
0_0_36381236_31506.cpp:68:2: note: in expansion of macro 'IOS'
  IOS;
  ^