View Compilation Error

0_0_39537920_12279.cpp: In function 'int read()':
0_0_39537920_12279.cpp:10:19: error: 'getchar_unlocked' was not declared in this scope; did you mean '_getchar_nolock'?
   10 |         char ch = getchar_unlocked();
      |                   ^~~~~~~~~~~~~~~~
      |                   _getchar_nolock