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]
 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]
 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]
 scanf("%ld",&p[j]);
 ~~~~~^~~~~~~~~~~~~

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