foo.cc: In function 'int main()':
foo.cc:56:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   56 |     scanf("%d%d",&n,&k);
      |     ~~~~~^~~~~~~~~~~~~~
foo.cc:58:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   58 |         scanf("%d%d%d",&q[i].a,&q[i].b,&q[i].c);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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