foo.cc: In function 'int main()':
foo.cc:68:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   68 |     scanf("%d%d%d%d",&t,&n,&k,&m);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
foo.cc:72:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   72 |         scanf("%d%d%d",&x,&y,&z);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~
foo.cc:86:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   86 |     scanf("%d",&d);
      |     ~~~~~^~~~~~~~~
foo.cc:90:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   90 |         scanf("%d%d%d",&x,&y,&z);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~

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