foo.cc: In function 'int main()':
foo.cc:87:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   87 |     freopen("game.in","r",stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~
foo.cc:88:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   88 |     freopen("game.out","w",stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

[Hydro](https://hydro.ac)提供评测服务