foo.cc: In function 'void solve()':
foo.cc:39:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   39 |         scanf("%lf%lf",&x[i],&y[i]);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~
foo.cc: In function 'int main()':
foo.cc:48:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   48 |     scanf("%d%lf",&n,&r);
      |     ~~~~~^~~~~~~~~~~~~~~

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