foo.cc: In function 'int main()':
foo.cc:39:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   39 |  freopen("water.in","r",stdin);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
foo.cc:40:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   40 |  freopen("water.out","w",stdout);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
foo.cc:41:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   41 |  scanf ("%d",&n);
      |  ~~~~~~^~~~~~~~~
foo.cc:44:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   44 |   scanf ("%d",&t[i].time);
      |   ~~~~~~^~~~~~~~~~~~~~~~~

Found 10 testcases.
[Hydro](https://hydro.ac)提供评测服务