View Compilation Error

0_0_39094631_29174.cpp: In function 'int main()':
0_0_39094631_29174.cpp:8:48: error: 'getchar_unlocked' was not declared in this scope; did you mean '_getchar_nolock'?
    8 |                 int n = 0; char C; while ((C = getchar_unlocked()) <= ' ');
      |                                                ^~~~~~~~~~~~~~~~
      |                                                _getchar_nolock
0_0_39094631_29174.cpp:9:43: error: 'getchar_unlocked' was not declared in this scope; did you mean '_getchar_nolock'?
    9 |                 str[n++] = C; while ((C = getchar_unlocked()) > ' ') str[n++] = C;
      |                                           ^~~~~~~~~~~~~~~~
      |                                           _getchar_nolock