View Compilation Error

0_0_36886890_32736.cpp: In function 'll fast_IO::read()':
0_0_36886890_32736.cpp:21:38: error: 'getchar_unlocked' was not declared in this scope
         while ((c = getchar_unlocked()) != '-' && c != '+' && (c < '0' || c > '9') && ~c);
                                      ^
0_0_36886890_32736.cpp:26:30: error: expected ')' before '_unlocked'
         while ((c = getchar()_unlocked) >= '0' && c <= '9')
                              ^
0_0_36886890_32736.cpp:27:53: error: expected ')' before ';' token
             num = (num << 1) + (num << 3) + (c ^ 48);
                                                     ^