foo.cc: In function 'int main()':
foo.cc:58:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   58 |     scanf("%d%d%d",&n,&m,&k);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~
foo.cc:63:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   63 |         scanf("%d%d%d",&u,&v,&w);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~
foo.cc:71:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   71 |         scanf("%d",&kx);
      |         ~~~~~^~~~~~~~~~

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