foo.cc: In function 'int main()':
foo.cc:83:38: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   83 |     for(int i = 0; i < n1; i++) scanf("%lf%lf", &p1[i].x, &p1[i].y);
      |                                 ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
foo.cc:84:38: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   84 |     for(int i = 0; i < n2; i++) scanf("%lf%lf", &p2[i].x, &p2[i].y);
      |                                 ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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