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View Compilation Error

0_0_39832433_19593.cpp: In function 'int read()':
0_0_39832433_19593.cpp:6:17: error: 'getchar_unlocked' was not declared in this scope; did you mean '_getchar_nolock'?
    6 |         char ch=getchar_unlocked();
      |                 ^~~~~~~~~~~~~~~~
      |                 _getchar_nolock


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