foo.cc: In function 'int main()':
foo.cc:18:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   18 |   scanf("%d%lld",&n,&m);
      |   ~~~~~^~~~~~~~~~~~~~~~
foo.cc:20:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   20 |   for(int i=1;i<=n;i++) scanf("%lld",&p[i].x);
      |                         ~~~~~^~~~~~~~~~~~~~~~
foo.cc:21:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   21 |   for(int i=1;i<=n;i++) scanf("%lld",&p[i].y);
      |                         ~~~~~^~~~~~~~~~~~~~~~

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