foo.cc: In function 'int main()':
foo.cc:181:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  181 |     scanf("%lld",&n);
      |     ~~~~~^~~~~~~~~~~
foo.cc:185:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  185 |         scanf("%lld %lld %lld",&x,&y,&c);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
foo.cc:189:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  189 |     scanf("%lld",&m);
      |     ~~~~~^~~~~~~~~~~
foo.cc:192:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  192 |         scanf("%lld",&jd[i]);
      |         ~~~~~^~~~~~~~~~~~~~~

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