foo.cc: In function 'int main()':
foo.cc:8:23: error: 'class std::basic_ostream<char>' has no member named 'sync_with_Stdio'; did you mean 'sync_with_stdio'?
    8 |     cin.tie(nullptr)->sync_with_Stdio(false);
      |                       ^~~~~~~~~~~~~~~
      |                       sync_with_stdio

正在同步测试数据，请稍后
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