foo.cc: In function 'int main()':
foo.cc:22:6: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   22 | scanf("%ld %ld",&n,&d);
      | ~~~~~^~~~~~~~~~~~~~~~~
foo.cc:26:6: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   26 | scanf("%ld ",&p[j]);
      | ~~~~~^~~~~~~~~~~~~~
foo.cc:27:6: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   27 | scanf("%ld",&p[j]);
      | ~~~~~^~~~~~~~~~~~~

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