foo.cc: In function 'int main()':
foo.cc:7:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
    7 |  freopen("plant.in","r",stdin);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
foo.cc:8:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
    8 |  freopen("plant.out","w",stdout);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
foo.cc:9:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    9 |  scanf("%d",&t);
      |  ~~~~~^~~~~~~~~
foo.cc:12:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   12 |   scanf("%d %d %d %d",&x,&y,&z,&n);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

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Found 10 testcases.
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