foo.cc: In function 'int main()':
foo.cc:29:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   29 |  freopen("plant.in","r",stdin);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
foo.cc:30:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   30 |  freopen("plant.out","w",stdout);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
foo.cc:31:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   31 |  scanf("%d",&t);
      |  ~~~~~^~~~~~~~~
foo.cc:35:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   35 |   scanf("%d%d%d%d",&x,&y,&z,&n);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
foo.cc:34:9: warning: 'j' may be used uninitialized in this function [-Wmaybe-uninitialized]
   34 |   int i,j;
      |         ^

Found 1 testcases.
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