foo.cc: In function 'int main()':
foo.cc:11:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   11 |  freopen("water.in","r",stdin);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
foo.cc:12:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   12 |  freopen("water.out","w",stdout);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
foo.cc:16:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   16 |  scanf("%d",&n);
      |  ~~~~~^~~~~~~~~
foo.cc:18:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   18 |  scanf("%d",&t[i].time);
      |  ~~~~~^~~~~~~~~~~~~~~~~

Found 10 testcases.
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